Water Supply, sanitation and hygiene development
Around 1.1 billion people globally do not have access to improved water supply sources whereas 2.4 billion people do not have access to any type of improved sanitation facility. About 2 million people die every year due to diarrhoeal diseases, most of them are children less than 5 years of age. The most affected are the populations in developing countries, living in extreme conditions of poverty, normally peri-urban dwellers or rural inhabitants. Among the main problems which are responsible for this situation are: lack of priority given to the sector, lack of financial resources, lack of sustainability of water supply and sanitation services, poor hygiene behaviours, and inadequate sanitation in public places including hospitals, health centres and schools. Providing access to sufficient quantities of safe water, the provision of facilities for a sanitary disposal of excreta, and introducing sound hygiene behaviours are of capital importance to reduce the burden of disease caused by these risk factors.
The work of WHO in this field covers the following topics:
Operation and maintenance
Environmental sanitation and hygiene development
Healthy settings
Environmental health in emergencies and disasters
Water and sanitation on ships and aircrafts
Household water treatment and safe storage
See alsoInternational Year of Sanitation 2008 International health regulations Revision of the International Health Regulations [pdf 400kb]
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Subscribe to the WATERSANITATION mailing list
EVENTS
Household Water Treatment & Safe Storage Network [pdf 147kb]Technical Meeting21–23 September 2009
International Year of Sanitation 2008
HIGHLIGHTS
Health and Environment LexiconLink to the database
List of publications in alphabetical orderFull text
RECENT PUBLICATIONS
Calcium and Magnesium in Drinking-water: Public health significance
Water Safety Plan Manual: Step-by-step risk management for drinking-water suppliers
Guidelines for Drinking-Water Quality, Second Addendum to the 3rd Edition Volume 1 - Recommendations
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Saturday, June 20, 2009
Water Supply and Sanitation Monitoring
At the end of the International Drinking Water Supply and Sanitation Decade (1981-1990), WHO and UNICEF established a Joint Monitoring Programme for Water Supply and Sanitation (JMP). The overall aim of the JMP is to report globally on the status of water supply and sanitation sector, and to support countries in improving their monitoring performance to enable better planning and management at the country level. The JMP is the official arrangement within the UN System to produce information for the UN Secretary General on the progress of achieving the Millennium Development Goals related to water supply and sanitation.
Although the JMP has been producing coverage reports since 1990, it was only in 2000 that the JMP statistics were based mainly on data from household surveys such as Demographic and Health Surveys (DHS), Multiple Indicator Cluster Surveys (MICS) and World Health Surveys (WHS). The reports listed below (available for downloading) are the latest JMP reports, all of them based on survey information.UN-Water Global Annual Assessment of Sanitation and Drinking-Water (GLAAS) Progress on Drinking-water and Sanitation: special focus on sanitation A Snapshot of Sanitation in Africa Meeting the MDG drinking-water and sanitation target: the urban and rural challenge of the decade Water for life: Making it happen. WHO/UNICEF Joint Monitoring Report, 2005 WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation Sanitation: Meeting the MDG drinking water and sanitation target, 2004 Global Water Supply and Sanitation Assessment 2000 Report
See alsoCore questions on drinking-water and sanitation for household surveys Asia Water Watch 2015
Additional information on JMP can be seen at: www.wssinfo.org.
SUBSCRIBE
Subscribe to the WATERSANITATION mailing list
EVENTS
Household Water Treatment & Safe Storage Network [pdf 147kb]Technical Meeting21–23 September 2009
International Year of Sanitation 2008
HIGHLIGHTS
Health and Environment LexiconLink to the database
List of publications in alphabetical orderFull text
RECENT PUBLICATIONS
Calcium and Magnesium in Drinking-water: Public health significance
Water Safety Plan Manual: Step-by-step risk management for drinking-water suppliers
Guidelines for Drinking-Water Quality, Second Addendum to the 3rd Edition Volume 1 - Recommendations
Although the JMP has been producing coverage reports since 1990, it was only in 2000 that the JMP statistics were based mainly on data from household surveys such as Demographic and Health Surveys (DHS), Multiple Indicator Cluster Surveys (MICS) and World Health Surveys (WHS). The reports listed below (available for downloading) are the latest JMP reports, all of them based on survey information.UN-Water Global Annual Assessment of Sanitation and Drinking-Water (GLAAS) Progress on Drinking-water and Sanitation: special focus on sanitation A Snapshot of Sanitation in Africa Meeting the MDG drinking-water and sanitation target: the urban and rural challenge of the decade Water for life: Making it happen. WHO/UNICEF Joint Monitoring Report, 2005 WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation Sanitation: Meeting the MDG drinking water and sanitation target, 2004 Global Water Supply and Sanitation Assessment 2000 Report
See alsoCore questions on drinking-water and sanitation for household surveys Asia Water Watch 2015
Additional information on JMP can be seen at: www.wssinfo.org.
SUBSCRIBE
Subscribe to the WATERSANITATION mailing list
EVENTS
Household Water Treatment & Safe Storage Network [pdf 147kb]Technical Meeting21–23 September 2009
International Year of Sanitation 2008
HIGHLIGHTS
Health and Environment LexiconLink to the database
List of publications in alphabetical orderFull text
RECENT PUBLICATIONS
Calcium and Magnesium in Drinking-water: Public health significance
Water Safety Plan Manual: Step-by-step risk management for drinking-water suppliers
Guidelines for Drinking-Water Quality, Second Addendum to the 3rd Edition Volume 1 - Recommendations
Water Sanitation and Health (WSH)
An important fraction of the burden of water-related diseases (in particular: water-related vector-borne diseases) is attributable to the way water resources are developed and managed. In many parts of the world the adverse health impacts of water pollution, dam construction, irrigation development and flood control cause significant preventable disease.
WHO’s Water, Sanitation and Health Programme focuses on: - Water resource quality - Health impact assessment - Intersectoral collaboration - Environmental management
It also explores options to integrate health risk assessment and management into strategies and programmes for nature conservation, in particular of wetlands, and for the promotion of biological diversity.
See also- Water, sanitation and hygiene links to health: facts and figures updated November 2004 - Publications on health in water resources development - Useful links - Posters
WHO’s Water, Sanitation and Health Programme focuses on: - Water resource quality - Health impact assessment - Intersectoral collaboration - Environmental management
It also explores options to integrate health risk assessment and management into strategies and programmes for nature conservation, in particular of wetlands, and for the promotion of biological diversity.
See also- Water, sanitation and hygiene links to health: facts and figures updated November 2004 - Publications on health in water resources development - Useful links - Posters
Water, Sanitation and Hygiene
WHO works on aspects of water, sanitation and hygiene where the health burden is high, where interventions could make a major difference and where the present state of knowledge is poor: :: Drinking-water quality :: Bathing waters :: Water resources :: Water supply and sanitation monitoring :: Water, sanitation and hygiene development :: Wastewater use :: Water-related disease :: Healthcare waste :: Emerging issues in water and infectious disease
Our work on water sanitation and hygiene includes the six core functions of WHO:
articulating consistent, ethical and evidence-based policy and advocacy positions;
managing information by assessing trends and comparing performance; setting the agenda for, and stimulating, research and development;
catalysing change through technical and policy support, in ways that stimulate cooperation and action and help to build sustainable national and intercountry capacity;
negotiating and sustaining national and global partnerships;
setting, validating, monitoring and pursuing the proper implementation of norms and standards;
stimulating the development and testing of new technologies, tools and guidelines.
All current information on water, sanitation and health is available on the internet. :: Browse the WSH catalogue of information products [pdf 4.17Mb] :: Browse the alphabetical list of documents available online
In addition, information is available here on: :: Our aim and objectives :: Our present plan of work :: Our collaborating centres :: Water-related work of WHO Regional Offices
SUBSCRIBE
Subscribe to the WATERSANITATION mailing list
EVENTS
Household Water Treatment & Safe Storage Network [pdf 147kb]Technical Meeting21–23 September 2009
International Year of Sanitation 2008
HIGHLIGHTS
Health and Environment LexiconLink to the database
List of publications in alphabetical orderFull text
RECENT PUBLICATIONS
Calcium and Magnesium in Drinking-water: Public health significance
Water Safety Plan Manual: Step-by-step risk management for drinking-water suppliers
Guidelines for Drinking-Water Quality, Second Addendum to the 3rd Edition Volume 1 - Recommendations
Our work on water sanitation and hygiene includes the six core functions of WHO:
articulating consistent, ethical and evidence-based policy and advocacy positions;
managing information by assessing trends and comparing performance; setting the agenda for, and stimulating, research and development;
catalysing change through technical and policy support, in ways that stimulate cooperation and action and help to build sustainable national and intercountry capacity;
negotiating and sustaining national and global partnerships;
setting, validating, monitoring and pursuing the proper implementation of norms and standards;
stimulating the development and testing of new technologies, tools and guidelines.
All current information on water, sanitation and health is available on the internet. :: Browse the WSH catalogue of information products [pdf 4.17Mb] :: Browse the alphabetical list of documents available online
In addition, information is available here on: :: Our aim and objectives :: Our present plan of work :: Our collaborating centres :: Water-related work of WHO Regional Offices
SUBSCRIBE
Subscribe to the WATERSANITATION mailing list
EVENTS
Household Water Treatment & Safe Storage Network [pdf 147kb]Technical Meeting21–23 September 2009
International Year of Sanitation 2008
HIGHLIGHTS
Health and Environment LexiconLink to the database
List of publications in alphabetical orderFull text
RECENT PUBLICATIONS
Calcium and Magnesium in Drinking-water: Public health significance
Water Safety Plan Manual: Step-by-step risk management for drinking-water suppliers
Guidelines for Drinking-Water Quality, Second Addendum to the 3rd Edition Volume 1 - Recommendations
Indoor air pollution
More than three billion people worldwide continue to depend on solid fuels, including biomass fuels (wood, dung, agricultural residues) and coal, for their energy needs.
Cooking and heating with solid fuels on open fires or traditional stoves results in high levels of indoor air pollution. Indoor smoke contains a range of health-damaging pollutants, such as small particles and carbon monoxide, and particulate pollution levels may be 20 times higher than accepted guideline values.
According to The world health report 2002 indoor air pollution is responsible for 2.7% of the global burden of disease.
WHO’s Programme on Indoor Air Pollution
To combat this substantial and growing burden of disease, WHO has developed a comprehensive programme to support developing countries. WHO's Programme on Indoor Air Pollution focuses on:- Research and evaluation - Capacity building - Evidence for policy-makers
Cooking and heating with solid fuels on open fires or traditional stoves results in high levels of indoor air pollution. Indoor smoke contains a range of health-damaging pollutants, such as small particles and carbon monoxide, and particulate pollution levels may be 20 times higher than accepted guideline values.
According to The world health report 2002 indoor air pollution is responsible for 2.7% of the global burden of disease.
WHO’s Programme on Indoor Air Pollution
To combat this substantial and growing burden of disease, WHO has developed a comprehensive programme to support developing countries. WHO's Programme on Indoor Air Pollution focuses on:- Research and evaluation - Capacity building - Evidence for policy-makers
CLIMATIC CHANGE
The Earth is the only planet in our solar system that supports life. The complex process of evolution occurred on Earth only because of some unique environmental conditions that were present: water, an oxygen-rich atmosphere, and a suitable surface temperature.
The Earth's climate system constantly adjusts so as to maintain a balance between the energy that reaches it from the sun and the energy that goes from Earth back to space. This means that even a small rise in temperature could mean accompanying changes in cloud cover and wind patterns.
It is not just man-made pollution of the atmosphere which can cause climate change. Changes in the way ocean water circulates around the world can also influence climate, because the oceans store even more heat than the atmosphere.
Over the last 150-200 years climate change has been taking place too rapidly and certain plant and animal species have found it hard to adapt. Human activities are said to be responsible for the speed at which this change has occurred and it is now a cause of worry to scientists.
The atmosphere surrounding the earth is made up of nitrogen (78%), oxygen (21%) and the remainder, 1%, is made up of trace gases (called so because they are present in very small quantities) that include the greenhouse gases carbon dioxide, methane, ozone, water vapor, and nitrous oxide. These greenhouse gases act as a blanket and protect it from the harmful ultra violet rays of the sun. They can also be regarded as natural controllers of the earth's temperature system.
Causes of climate change
The earth's climate is dynamic and always changing through a natural cycle. What the world is more worried about is that the changes that are occurring today have been speeded up because of man's activities. These changes are being studied by scientists all over the world who are finding evidence from tree rings, pollen samples, ice cores, and sea sediments. The causes of climate change can be divided into two categories - those that are due to natural causes and those that are created by man. Natural causes There are a number of natural factors responsible for climate change. Some of the more prominent ones are continental drift, volcanoes, ocean currents, the earth's tilt, and comets and meteorites. Let's look at them in a little detail.
Continental drift
You may have noticed something peculiar about South America and Africa on a map of the world - don't they seem to fit into each other like pieces in a jigsaw puzzle?
About 200 million years ago they were joined together. Scientists believe that back then, the earth was not as we see it today, but the continents were all part of one large landmass. Proof of this comes from the similarity between plant and animal fossils and broad belts of rocks found on the eastern coastline of South America and western coastline of Africa, which are now widely separated by the Atlantic Ocean. The discovery of fossils of tropical plants (in the form of coal deposits) in Antarctica has led to the conclusion that this frozen land at some time in the past, must have been situated closer to the equator, where the climate was tropical, with swamps and plenty of lush vegetation.
The continents that we are familiar with today were formed when the landmass began gradually drifting apart, millions of years back. This drift also had an impact on the climate because it changed the physical features of the landmass, their position and the position of water bodies. The separation of the landmasses changed the flow of ocean currents and winds, which affected the climate. This drift of the continents continues even today; the Himalayan range is rising by about 1 mm (millimeter) every year because the Indian land mass is moving towards the Asian land mass, slowly but steadily.Volcanoes
When a volcano erupts it throws out large volumes of sulfur dioxide (SO2), water vapor, dust, and ash into the atmosphere. Although the volcanic activity may last only a few days, the large volumes of gases and ash can influence climatic patterns for years. Millions of tons of sulfur dioxide gas can reach the upper levels of the atmosphere (called the stratosphere) from a major eruption. The gases and dust particles partially block the incoming rays of the sun, leading to cooling. Sulfur dioxide combines with water to form tiny droplets of sulfuric acid. These droplets are so small that many of them can stay aloft for several years. They are efficient reflectors of sunlight, and screen the ground from some of the energy that it would ordinarily receive from the sun. Winds in the upper levels of the atmosphere, called the stratosphere, carry the aerosols rapidly around the globe in either an easterly or westerly direction. Movement of aerosols north and south is always much slower. This should give you some idea of the ways by which cooling can be brought about for a few years after a major volcanic eruption. Mount Pinatoba, in the Philippine islands erupted in April 1991 emitting thousands of tons of gases into the atmosphere. Volcanic eruptions of this magnitude can reduce the amount of solar radiation reaching the Earth's surface, lowering temperatures in the lower levels of the atmosphere (called the troposphere), and changing atmospheric circulation patterns. The extent to which this occurs is an ongoing debate. Another striking example was in the year 1816, often referred to as "the year without a summer." Significant weather-related disruptions occurred in New England and in Western Europe with killing summer frosts in the United States and Canada. These strange phenomena were attributed to a major eruption of the Tambora volcano in Indonesia, in 1815.
The earth's tilt
The earth makes one full orbit around the sun each year. It is tilted at an angle of 23.5° to the perpendicular plane of its orbital path. For one half of the year when it is summer, the northern hemisphere tilts towards the sun. In the other half when it is winter, the earth is tilted away from the sun. If there was no tilt we would not have experienced seasons. Changes in the tilt of the earth can affect the severity of the seasons - more tilt means warmer summers and colder winters; less tilt means cooler summers and milder winters.The Earth's orbit is somewhat elliptical, which means that the distance between the earth and the Sun varies over the course of a year. We usually think of the earth's axis as being fixed, after all, it always seems to point toward Polaris (also known as the Pole Star and the North Star). Actually, it is not quite constant: the axis does move, at the rate of a little more than a half-degree each century. So Polaris has not always been, and will not always be, the star pointing to the North. When the pyramids were built, around 2500 BC, the pole was near the star Thuban (Alpha Draconis). This gradual change in the direction of the earth's axis, called precession is responsible for changes in the climate.
Ocean currents
The oceans are a major component of the climate system. They cover about 71% of the Earth and absorb about twice as much of the sun's radiation as the atmosphere or the land surface. Ocean currents move vast amounts of heat across the planet - roughly the same amount as the atmosphere does. But the oceans are surrounded by land masses, so heat transport through the water is through channels. Winds push horizontally against the sea surface and drive ocean current patterns. Certain parts of the world are influenced by ocean currents more than others. The coast of Peru and other adjoining regions are directly influenced by the Humboldt current that flows along the coastline of Peru. The El Niño event in the Pacific Ocean can affect climatic conditions all over the world.Another region that is strongly influenced by ocean currents is the North Atlantic. If we compare places at the same latitude in Europe and North America the effect is immediately obvious. Take a closer look at this example - some parts of coastal Norway have an average temperature of -2°C in January and 14°C in July; while places at the same latitude on the Pacific coast of Alaska are far colder: -15°C in January and only 10°C in July. The warm current along the Norewgian coast keeps much of the Greenland-Norwegian Sea free of ice even in winter. The rest of the Arctic Ocean, even though it is much further south, remains frozen. Ocean currents have been known to change direction or slow down. Much of the heat that escapes from the oceans is in the form of water vapour, the most abundant greenhouse gas on Earth. Yet, water vapor also contributes to the formation of clouds, which shade the surface and have a net cooling effect. Any or all of these phenomena can have an impact on the climate, as is believed to have happened at the end of the last Ice Age, about 14,000 years ago.
Human causes
The Industrial Revolution in the 19th century saw the large-scale use of fossil fuels for industrial activities. These industries created jobs and over the years, people moved from rural areas to the cities. This trend is continuing even today. More and more land that was covered with vegetation has been cleared to make way for houses. Natural resources are being used extensively for construction, industries, transport, and consumption. Consumerism (our increasing want for material things) has increased by leaps and bounds, creating mountains of waste. Also, our population has increased to an incredible extent. All this has contributed to a rise in greenhouse gases in the atmosphere. Fossil fuels such as oil, coal and natural gas supply most of the energy needed to run vehicles, generate electricity for industries, households, etc. The energy sector is responsible for about ¾ of the carbon dioxide emissions, 1/5 of the methane emissions and a large quantity of nitrous oxide. It also produces nitrogen oxides (NOx) and carbon monoxide (CO) which are not greenhouse gases but do have an influence on the chemical cycles in the atmosphere that produce or destroy greenhouse gases.Greenhouse gases and their sources
Carbon dioxide is undoubtedly, the most important greenhouse gas in the atmosphere. Changes in land use pattern, deforestation, land clearing, agriculture, and other activities have all led to a rise in the emission of carbon dioxide. Methane is another important greenhouse gas in the atmosphere. About ¼ of all methane emissions are said to come from domesticated animals such as dairy cows, goats, pigs, buffaloes, camels, horses, and sheep. These animals produce methane during the cud-chewing process. Methane is also released from rice or paddy fields that are flooded during the sowing and maturing periods. When soil is covered with water it becomes anaerobic or lacking in oxygen. Under such conditions, methane-producing bacteria and other organisms decompose organic matter in the soil to form methane. Nearly 90% of the paddy-growing area in the world is found in Asia, as rice is the staple food there. China and India, between them, have 80-90% of the world's rice-growing areas.Methane is also emitted from landfills and other waste dumps. If the waste is put into an incinerator or burnt in the open, carbon dioxide is emitted. Methane is also emitted during the process of oil drilling, coal mining and also from leaking gas pipelines (due to accidents and poor maintenance of sites). A large amount of nitrous oxide emission has been attributed to fertilizer application. This in turn depends on the type of fertilizer that is used, how and when it is used and the methods of tilling that are followed. Contributions are also made by leguminous plants, such as beans that add nitrogen to the soil.
How we all contribute every day
All of us in our daily lives contribute our bit to this change in the climate. Give these points a good, serious thought:
- Electricity is the main source of power in urban areas. All our gadgets run on electricity generated mainly from thermal power plants. These thermal power plants are run on fossil fuels (mostly coal) and are responsible for the emission of huge amounts of greenhouse gases and other pollutants. - Cars, buses, and trucks are the principal ways by which goods and people are transported in most of our cities. These are run mainly on petrol or diesel, both fossil fuels. - We generate large quantities of waste in the form of plastics that remain in the environment for many years and cause damage. - We use a huge quantity of paper in our work at schools and in offices. Have we ever thought about the number of trees that we use in a day? - Timber is used in large quantities for construction of houses, which means that large areas of forest have to be cut down.- A growing population has meant more and more mouths to feed. Because the land area available for agriculture is limited (and in fact, is actually shrinking as a result of ecological degradation), high-yielding varieties of crop are being grown to increase the agricultural output from a given area of land. However, such high-yielding varieties of crops require large quantities of fertilizers; and more fertilizer means more emissions of nitrous oxide, both from the field into which it is put and the fertilizer industry that makes it. Pollution also results from the run-off of fertilizer into water bodies.
The Earth's climate system constantly adjusts so as to maintain a balance between the energy that reaches it from the sun and the energy that goes from Earth back to space. This means that even a small rise in temperature could mean accompanying changes in cloud cover and wind patterns.
It is not just man-made pollution of the atmosphere which can cause climate change. Changes in the way ocean water circulates around the world can also influence climate, because the oceans store even more heat than the atmosphere.
Over the last 150-200 years climate change has been taking place too rapidly and certain plant and animal species have found it hard to adapt. Human activities are said to be responsible for the speed at which this change has occurred and it is now a cause of worry to scientists.
The atmosphere surrounding the earth is made up of nitrogen (78%), oxygen (21%) and the remainder, 1%, is made up of trace gases (called so because they are present in very small quantities) that include the greenhouse gases carbon dioxide, methane, ozone, water vapor, and nitrous oxide. These greenhouse gases act as a blanket and protect it from the harmful ultra violet rays of the sun. They can also be regarded as natural controllers of the earth's temperature system.
Causes of climate change
The earth's climate is dynamic and always changing through a natural cycle. What the world is more worried about is that the changes that are occurring today have been speeded up because of man's activities. These changes are being studied by scientists all over the world who are finding evidence from tree rings, pollen samples, ice cores, and sea sediments. The causes of climate change can be divided into two categories - those that are due to natural causes and those that are created by man. Natural causes There are a number of natural factors responsible for climate change. Some of the more prominent ones are continental drift, volcanoes, ocean currents, the earth's tilt, and comets and meteorites. Let's look at them in a little detail.
Continental drift
You may have noticed something peculiar about South America and Africa on a map of the world - don't they seem to fit into each other like pieces in a jigsaw puzzle?
About 200 million years ago they were joined together. Scientists believe that back then, the earth was not as we see it today, but the continents were all part of one large landmass. Proof of this comes from the similarity between plant and animal fossils and broad belts of rocks found on the eastern coastline of South America and western coastline of Africa, which are now widely separated by the Atlantic Ocean. The discovery of fossils of tropical plants (in the form of coal deposits) in Antarctica has led to the conclusion that this frozen land at some time in the past, must have been situated closer to the equator, where the climate was tropical, with swamps and plenty of lush vegetation.
The continents that we are familiar with today were formed when the landmass began gradually drifting apart, millions of years back. This drift also had an impact on the climate because it changed the physical features of the landmass, their position and the position of water bodies. The separation of the landmasses changed the flow of ocean currents and winds, which affected the climate. This drift of the continents continues even today; the Himalayan range is rising by about 1 mm (millimeter) every year because the Indian land mass is moving towards the Asian land mass, slowly but steadily.Volcanoes
When a volcano erupts it throws out large volumes of sulfur dioxide (SO2), water vapor, dust, and ash into the atmosphere. Although the volcanic activity may last only a few days, the large volumes of gases and ash can influence climatic patterns for years. Millions of tons of sulfur dioxide gas can reach the upper levels of the atmosphere (called the stratosphere) from a major eruption. The gases and dust particles partially block the incoming rays of the sun, leading to cooling. Sulfur dioxide combines with water to form tiny droplets of sulfuric acid. These droplets are so small that many of them can stay aloft for several years. They are efficient reflectors of sunlight, and screen the ground from some of the energy that it would ordinarily receive from the sun. Winds in the upper levels of the atmosphere, called the stratosphere, carry the aerosols rapidly around the globe in either an easterly or westerly direction. Movement of aerosols north and south is always much slower. This should give you some idea of the ways by which cooling can be brought about for a few years after a major volcanic eruption. Mount Pinatoba, in the Philippine islands erupted in April 1991 emitting thousands of tons of gases into the atmosphere. Volcanic eruptions of this magnitude can reduce the amount of solar radiation reaching the Earth's surface, lowering temperatures in the lower levels of the atmosphere (called the troposphere), and changing atmospheric circulation patterns. The extent to which this occurs is an ongoing debate. Another striking example was in the year 1816, often referred to as "the year without a summer." Significant weather-related disruptions occurred in New England and in Western Europe with killing summer frosts in the United States and Canada. These strange phenomena were attributed to a major eruption of the Tambora volcano in Indonesia, in 1815.
The earth's tilt
The earth makes one full orbit around the sun each year. It is tilted at an angle of 23.5° to the perpendicular plane of its orbital path. For one half of the year when it is summer, the northern hemisphere tilts towards the sun. In the other half when it is winter, the earth is tilted away from the sun. If there was no tilt we would not have experienced seasons. Changes in the tilt of the earth can affect the severity of the seasons - more tilt means warmer summers and colder winters; less tilt means cooler summers and milder winters.The Earth's orbit is somewhat elliptical, which means that the distance between the earth and the Sun varies over the course of a year. We usually think of the earth's axis as being fixed, after all, it always seems to point toward Polaris (also known as the Pole Star and the North Star). Actually, it is not quite constant: the axis does move, at the rate of a little more than a half-degree each century. So Polaris has not always been, and will not always be, the star pointing to the North. When the pyramids were built, around 2500 BC, the pole was near the star Thuban (Alpha Draconis). This gradual change in the direction of the earth's axis, called precession is responsible for changes in the climate.
Ocean currents
The oceans are a major component of the climate system. They cover about 71% of the Earth and absorb about twice as much of the sun's radiation as the atmosphere or the land surface. Ocean currents move vast amounts of heat across the planet - roughly the same amount as the atmosphere does. But the oceans are surrounded by land masses, so heat transport through the water is through channels. Winds push horizontally against the sea surface and drive ocean current patterns. Certain parts of the world are influenced by ocean currents more than others. The coast of Peru and other adjoining regions are directly influenced by the Humboldt current that flows along the coastline of Peru. The El Niño event in the Pacific Ocean can affect climatic conditions all over the world.Another region that is strongly influenced by ocean currents is the North Atlantic. If we compare places at the same latitude in Europe and North America the effect is immediately obvious. Take a closer look at this example - some parts of coastal Norway have an average temperature of -2°C in January and 14°C in July; while places at the same latitude on the Pacific coast of Alaska are far colder: -15°C in January and only 10°C in July. The warm current along the Norewgian coast keeps much of the Greenland-Norwegian Sea free of ice even in winter. The rest of the Arctic Ocean, even though it is much further south, remains frozen. Ocean currents have been known to change direction or slow down. Much of the heat that escapes from the oceans is in the form of water vapour, the most abundant greenhouse gas on Earth. Yet, water vapor also contributes to the formation of clouds, which shade the surface and have a net cooling effect. Any or all of these phenomena can have an impact on the climate, as is believed to have happened at the end of the last Ice Age, about 14,000 years ago.
Human causes
The Industrial Revolution in the 19th century saw the large-scale use of fossil fuels for industrial activities. These industries created jobs and over the years, people moved from rural areas to the cities. This trend is continuing even today. More and more land that was covered with vegetation has been cleared to make way for houses. Natural resources are being used extensively for construction, industries, transport, and consumption. Consumerism (our increasing want for material things) has increased by leaps and bounds, creating mountains of waste. Also, our population has increased to an incredible extent. All this has contributed to a rise in greenhouse gases in the atmosphere. Fossil fuels such as oil, coal and natural gas supply most of the energy needed to run vehicles, generate electricity for industries, households, etc. The energy sector is responsible for about ¾ of the carbon dioxide emissions, 1/5 of the methane emissions and a large quantity of nitrous oxide. It also produces nitrogen oxides (NOx) and carbon monoxide (CO) which are not greenhouse gases but do have an influence on the chemical cycles in the atmosphere that produce or destroy greenhouse gases.Greenhouse gases and their sources
Carbon dioxide is undoubtedly, the most important greenhouse gas in the atmosphere. Changes in land use pattern, deforestation, land clearing, agriculture, and other activities have all led to a rise in the emission of carbon dioxide. Methane is another important greenhouse gas in the atmosphere. About ¼ of all methane emissions are said to come from domesticated animals such as dairy cows, goats, pigs, buffaloes, camels, horses, and sheep. These animals produce methane during the cud-chewing process. Methane is also released from rice or paddy fields that are flooded during the sowing and maturing periods. When soil is covered with water it becomes anaerobic or lacking in oxygen. Under such conditions, methane-producing bacteria and other organisms decompose organic matter in the soil to form methane. Nearly 90% of the paddy-growing area in the world is found in Asia, as rice is the staple food there. China and India, between them, have 80-90% of the world's rice-growing areas.Methane is also emitted from landfills and other waste dumps. If the waste is put into an incinerator or burnt in the open, carbon dioxide is emitted. Methane is also emitted during the process of oil drilling, coal mining and also from leaking gas pipelines (due to accidents and poor maintenance of sites). A large amount of nitrous oxide emission has been attributed to fertilizer application. This in turn depends on the type of fertilizer that is used, how and when it is used and the methods of tilling that are followed. Contributions are also made by leguminous plants, such as beans that add nitrogen to the soil.
How we all contribute every day
All of us in our daily lives contribute our bit to this change in the climate. Give these points a good, serious thought:
- Electricity is the main source of power in urban areas. All our gadgets run on electricity generated mainly from thermal power plants. These thermal power plants are run on fossil fuels (mostly coal) and are responsible for the emission of huge amounts of greenhouse gases and other pollutants. - Cars, buses, and trucks are the principal ways by which goods and people are transported in most of our cities. These are run mainly on petrol or diesel, both fossil fuels. - We generate large quantities of waste in the form of plastics that remain in the environment for many years and cause damage. - We use a huge quantity of paper in our work at schools and in offices. Have we ever thought about the number of trees that we use in a day? - Timber is used in large quantities for construction of houses, which means that large areas of forest have to be cut down.- A growing population has meant more and more mouths to feed. Because the land area available for agriculture is limited (and in fact, is actually shrinking as a result of ecological degradation), high-yielding varieties of crop are being grown to increase the agricultural output from a given area of land. However, such high-yielding varieties of crops require large quantities of fertilizers; and more fertilizer means more emissions of nitrous oxide, both from the field into which it is put and the fertilizer industry that makes it. Pollution also results from the run-off of fertilizer into water bodies.
Hungary Environment
Hungary has a temperate continental climate that is influenced by three main factors: the Eastern-European continental, the Western-European oceanic and the Mediterranean influence. Located in the lowest part of the Carpathian Basin, 84% of the country lies below 200m, with only 2% above 400m (mountain peaks reach 1015m in the north) and river gradients are generally low. Rivers enter from the west, north and east and drain southwards. The Hungarian Danube traverses 417km, forming the border with Slovakia in the NW and thereafter flowing south. In the east, also flowing southwards is the Tisza, covering 595km before reaching Serbia and Montenegro where it later flows into the Danube.
Because of the climate and geography, Hungary is vulnerable to any climatic changes brought about by global warming. Over the last several years, average summer temperature increased by 1°C, while spring temperatures increased by 0.77°C. In the autumn the temperatures are higher by 0.4-0.5°C and winters are warmer by 0.76°C. Additionally, the frequency of floods tripled during the last decade. Based on studies, during the last 50 years significant floods occurred 5-6 times a year and very large floods happened every 10-12 years. During the last nine years there were six big floods on the Hungarian rivers. Increased erosion of hillside land in neiboring countries and incresed urbanization in Hungary seem to be the most significant factors.
Hungary’s location is unique as it is in a basin surrounded by mountains that are located in other countries. This means that national practices of Austria, Slovakia, the Ukraine and Romania affect the Hungarian environment.
For example, In 2000 a dam leaked cyanide from a Romanian gold mine into the Tiza River, a tributary of the Danube, killing all forms of aquatic life for 250 miles (400 km) downstream. In Hungary about 85 tons of dead fish were removed from the Tiza River. In another recent example, high levels of toxic chemicals were found in the Raba, a border river of Hungary and Austria. Leather factories along the river in Austria who according to Austrian law are legally discharging into the river. These legal discharges are thought to be the source of the contamination in Hungary.
In 2003 a project, supported by the Ministry of Environment and Water and the Hungarian Academy of Sciences, was commissioned to prepare a study about the potential future of environmental challenges. The project called VAHAVA, Changing (VÁltozás) Impact (HAtás) Response (VÁlaszadás), - the past, the present and the future forecasts.
The main scope of the project was to adapt and respond to climate change impacts.
In addition, the report point out the need to develop a strategy for a more sustainable life style in Hungary, through the use of renewable energy. Currently only 3% of the country’s energy has a source of renewable energy: biomass (wood) and geothermal sources. The structure of the energy sector should be changed to incorporate the use of wind, solar, geothermal energy and second generation biofuels such as ethanol from cellulosic materials.
In June of 2007, Hungary adopted a climate change law. In reponse to this law, the Hungarian National Climate Change Strategy for 2008-2025 was created. The pillars for this strategy are the followings:
- Decrease in emissions, change of energy structure: Hungary is further striving to keep up with the Kyoto emission rates. Another objective is to change consumer behaviour towards conscious energy saving.
- Increase in energy efficiency: New financial sources should support climate saving processes, which could lead to the growth of efficiency.
- Change of government support in the field of energy: This should include new strategies where concerned people should be induced with policy instruments to increase energy-usage efficiency. Another objective is to provide financial support for renewable energy.
- Decrease of carbon-intensity in the field of traffic and transport :Mass transport ratio should be increased, parallel to developing the infrastructure for enabling cycling in the city. Cycling routes should not only be created in the capital and main cities, but all around the country. Regarding transportation, the proportion of non-road transportation should be increased, by also developing local infrastructure (e.g. train network). Regarding governmental actions higher emissions should lead to higher taxes, which is expected to be included into the road taxes. Besides that conscious city planning should facilitate efficient traffic and transportation too: more developed mass transport system, city planning, more pedestrian zones).
- Waste treatment: Waste treatment should be also developed, especially by the new structure of collecting and recycling useful waste. As a governmental initiative, further legal and economic measures should be introduced, partly as incentives for the people.
The Hungarian National Climate Change plan is a great start for a country-level plan to combat climate issues. The primarily objective should be however to change living styles and to support every-day people in changing their lifestyle to live sustainable in the future.
The missing focus of the plan is that the government (and maybe people too) should facilitate the creation of local communities who could help in teams and small groups to accomplish achieve the goal of sustainability.
The Hungarian government and officials have to prepare for the fact that climate change may have a disparate effect on certain underprivileged regions, the poor and the elderly. As suggested by the VAHAVA professionals a plan should be developed to support communities in creating local self-support projects.
Because of the climate and geography, Hungary is vulnerable to any climatic changes brought about by global warming. Over the last several years, average summer temperature increased by 1°C, while spring temperatures increased by 0.77°C. In the autumn the temperatures are higher by 0.4-0.5°C and winters are warmer by 0.76°C. Additionally, the frequency of floods tripled during the last decade. Based on studies, during the last 50 years significant floods occurred 5-6 times a year and very large floods happened every 10-12 years. During the last nine years there were six big floods on the Hungarian rivers. Increased erosion of hillside land in neiboring countries and incresed urbanization in Hungary seem to be the most significant factors.
Hungary’s location is unique as it is in a basin surrounded by mountains that are located in other countries. This means that national practices of Austria, Slovakia, the Ukraine and Romania affect the Hungarian environment.
For example, In 2000 a dam leaked cyanide from a Romanian gold mine into the Tiza River, a tributary of the Danube, killing all forms of aquatic life for 250 miles (400 km) downstream. In Hungary about 85 tons of dead fish were removed from the Tiza River. In another recent example, high levels of toxic chemicals were found in the Raba, a border river of Hungary and Austria. Leather factories along the river in Austria who according to Austrian law are legally discharging into the river. These legal discharges are thought to be the source of the contamination in Hungary.
In 2003 a project, supported by the Ministry of Environment and Water and the Hungarian Academy of Sciences, was commissioned to prepare a study about the potential future of environmental challenges. The project called VAHAVA, Changing (VÁltozás) Impact (HAtás) Response (VÁlaszadás), - the past, the present and the future forecasts.
The main scope of the project was to adapt and respond to climate change impacts.
In addition, the report point out the need to develop a strategy for a more sustainable life style in Hungary, through the use of renewable energy. Currently only 3% of the country’s energy has a source of renewable energy: biomass (wood) and geothermal sources. The structure of the energy sector should be changed to incorporate the use of wind, solar, geothermal energy and second generation biofuels such as ethanol from cellulosic materials.
In June of 2007, Hungary adopted a climate change law. In reponse to this law, the Hungarian National Climate Change Strategy for 2008-2025 was created. The pillars for this strategy are the followings:
- Decrease in emissions, change of energy structure: Hungary is further striving to keep up with the Kyoto emission rates. Another objective is to change consumer behaviour towards conscious energy saving.
- Increase in energy efficiency: New financial sources should support climate saving processes, which could lead to the growth of efficiency.
- Change of government support in the field of energy: This should include new strategies where concerned people should be induced with policy instruments to increase energy-usage efficiency. Another objective is to provide financial support for renewable energy.
- Decrease of carbon-intensity in the field of traffic and transport :Mass transport ratio should be increased, parallel to developing the infrastructure for enabling cycling in the city. Cycling routes should not only be created in the capital and main cities, but all around the country. Regarding transportation, the proportion of non-road transportation should be increased, by also developing local infrastructure (e.g. train network). Regarding governmental actions higher emissions should lead to higher taxes, which is expected to be included into the road taxes. Besides that conscious city planning should facilitate efficient traffic and transportation too: more developed mass transport system, city planning, more pedestrian zones).
- Waste treatment: Waste treatment should be also developed, especially by the new structure of collecting and recycling useful waste. As a governmental initiative, further legal and economic measures should be introduced, partly as incentives for the people.
The Hungarian National Climate Change plan is a great start for a country-level plan to combat climate issues. The primarily objective should be however to change living styles and to support every-day people in changing their lifestyle to live sustainable in the future.
The missing focus of the plan is that the government (and maybe people too) should facilitate the creation of local communities who could help in teams and small groups to accomplish achieve the goal of sustainability.
The Hungarian government and officials have to prepare for the fact that climate change may have a disparate effect on certain underprivileged regions, the poor and the elderly. As suggested by the VAHAVA professionals a plan should be developed to support communities in creating local self-support projects.
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