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More people across the United States – nearly 40% – live in places with unhealthy levels of polluted air, according to a new report from the American Lung Association.
Looking down from the Hollywood Hills, with Griffith Observatory on the hill in the foreground, air pollution is visible in downtown Los Angeles on a late afternoon.. 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.
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.
That means the air quality is dangerous for children, older people and those with respiratory conditions. DAQ must issue a Code Red when the 24-hour average is at least 55.5 nanograms per cubic meter.
In the 2024 “State of the Air” report by the American Lung Association, despite decades of progress cleaning up air pollution, 39% of people living in America (131.2 million people) still live ...
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.
Nearly 40% of people in the U.S. are living in areas with unhealthy levels of air pollution and the country is backsliding on clean air progress as the effects of climate change intensify ...
Air pollution is caused predominantly by burning fossil fuels, cars, and much more. [4] Natural sources of air pollution include forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds, and natural radioactivity. These natural sources of pollution often soon disperse and thin settling near their locale.