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Ambient (outdoor) air pollution is a major environmental health problem affecting everyone in low-, middle-, and high-income countries. It causes 4.2 million premature deaths per year and is associated with cardiovascular, respiratory and other diseases.
Learn about the sources, health impacts and WHO guidelines for different types of air pollutants, such as particulate matter, nitrogen dioxide, ozone, carbon monoxide, sulfur dioxide and lead. Air pollution is responsible for 6.7 million premature deaths every year and can cause cardiovascular, respiratory, cerebrovascular and other diseases.
Air pollution is a major threat to health and climate, causing 7 million premature deaths annually. WHO provides guidance, tools and data on air pollution and its sources, and promotes policies and interventions to reduce it.
WHO data show that almost all of the global population breathes air that exceeds WHO guideline limits and contains high levels of pollutants, causing millions of premature deaths each year. Learn about the health impacts, sources and solutions of ambient and household air pollution at the first global conference on air pollution and health in 2018.
Learn how air pollution and climate change are linked in terms of health risks and how reducing emissions can benefit both health and climate. Find out about the sources, types and effects of air pollutants and short-lived climate pollutants on the environment and human health.
Find out how air pollution affects health worldwide, with data on ambient and household air pollution levels, burden of disease, and interventions. Explore interactive tools, publications, and maps on air quality standards and guidelines.
Learn how air pollution can cause inflammation, oxidative stress, and disease in various organs and systems of the body. Find out the main pollutants, disease outcomes, and susceptible populations associated with air pollution exposure.
Learn about the causes, impacts and solutions of household air pollution, which affects 2.3 billion people worldwide and causes 3.2 million deaths per year. Find out how WHO guidelines and policies can help reduce exposure to harmful pollutants and protect health.
Learn about POPs, chemicals that persist in the environment and accumulate in the food chain, and their effects on human health and the environment. Find out how WHO monitors POPs levels in breastmilk and food, and what is being done to prevent POPs contamination.
Air pollution causes various health outcomes, such as respiratory infections, heart disease, stroke, and lung cancer, and is the second leading cause of NCDs globally. WHO provides evidence, tools, and guidance to reduce air pollution and its impacts on health and the environment.