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Air pollution can occur naturally or be caused by human activities. [4] Air pollution causes around 7 or 8 million deaths each year. [5] [6] It is a significant risk factor for a number of pollution-related diseases, including heart disease, stroke, chronic obstructive pulmonary disease (COPD), asthma and lung cancer.
Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems. Health problems attributed to air pollution include premature death, cancer, organ failure, infections, behavioral changes, and other diseases.
Various definitions of pollution exist, which may or may not recognize certain types, such as noise pollution or greenhouse gases.The United States Environmental Protection Administration defines pollution as "Any substances in water, soil, or air that degrade the natural quality of the environment, offend the senses of sight, taste, or smell, or cause a health hazard.
Smog, or smoke fog, is a type of intense air pollution.The word "smog" was coined in the early 20th century, and is a portmanteau of the words smoke and fog [1] to refer to smoky fog due to its opacity, and odor. [2]
Air pollution is globally responsible for over 6.5 million deaths each year. [28] Air pollution is the contamination of an atmosphere due to the presence of substances that are harmful to the health of living organisms, the environment or climate. [29]
The AQI made its debut in 1968, when the National Air Pollution Control Administration undertook an initiative to develop an air quality index and to apply the methodology to Metropolitan Statistical Areas. The impetus was to draw public attention to the issue of air pollution and indirectly push responsible local public officials to take ...
Mobile source air pollution – Air pollution emitted by motor vehicles, airplanes, locomotives, and other engines; Planned obsolescence – Policy of planning or designing a product with an artificially limited useful life; Remote work – Employees working from any location; Service life – Period of time where an object can fulfill a function
Air quality or ambient/outdoor air pollution is represented by the annual mean concentration of particulate matter PM 10 (particles smaller than 10 microns) and PM 2.5 (particles smaller than 2.5 microns, about 25 to 100 times thinner than a human hair).