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Air pollution is the contamination of air due to the presence of substances called pollutants in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. [1] It is also the contamination of the indoor or outdoor environment either by chemical, physical, or biological agents ...
Regulation of air pollution is a shared responsibility between federal, state, and local governments. Since 1999, the EPA has used the air quality index (AQI) to communicate air pollution risk to the public, on a scale from 0 to 500, with six levels from Good to Hazardous. [11] (.
Ground-level ozone ( O3 ), also known as surface-level ozone and tropospheric ozone, is a trace gas in the troposphere (the lowest level of the Earth's atmosphere ), with an average concentration of 20–30 parts per billion by volume (ppbv), with close to 100 ppbv in polluted areas. [1] [2] Ozone is also an important constituent of the ...
Air pollution in the United Kingdom. Air pollution in the United Kingdom has long been considered a significant health issue, and it causes numerous other environmental problems such as damage to buildings, [1] [2] forests, and crops. [3] Many areas, including major cities like London, are found to be significantly and regularly above legal and ...
Pollution is the introduction of contaminants into the natural environment that cause adverse change. [1] Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring ...
As with many countries, pollution in the United States is a concern for environmental organizations, government agencies and individuals. Pollution from U.S. manufacturing has declined massively since 1990 (despite an increase in production). A 2018 study in the American Economic Review found that environmental regulation is the primary driver ...
Air pollution diseases. According to the World Health Organization (WHO), air pollution is linked to 7 million premature deaths (1 in 8 of total global deaths) in 2012. Here is a breakdown by the diseases air pollution causes: Outdoor air pollution. 40% – ischaemic heart disease; 40% – stroke; 11% – chronic obstructive pulmonary disease
Indoor air quality ( IAQ) is the air quality within buildings and structures. Poor indoor air quality due to indoor air pollution is known to affect the health, comfort, and well-being of building occupants. It has also been linked to sick building syndrome, respiratory issues, reduced productivity, and impaired learning in schools.