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Anthropogenic air pollution has affected the United States since the beginning of the Industrial Revolution. [75] According to a 2024 report: "39% of people living in America—131.2 million people—still live in places with failing grades for unhealthy levels of ozone or particle pollution."
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.
The International Day of Clean Air for blue skies is designated by the United Nations General Assembly on 7 September to strengthen international cooperation in improving air quality and reducing air pollution. The designation was made through the Assembly resolution 74/212 and adopted at that session's 52nd plenary meeting on 19 December 2019.
A new study published Thursday in the journal PLOS Climate found the wealthiest 10% of Americans are responsible for almost half of planet-heating pollution in the US, and called on governments to ...
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.
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.
The changes in air pollution during COVID lockdowns have also impacted water quality. Scientists have long noted that air quality and surface water quality have a close connection; [56] however, the decrease in air pollution during the pandemic specific impact on water systems remains unclear. Most studies have found that improvements due to ...
Levels of air pollution rose during the Industrial Revolution, sparking the first modern environmental laws to be passed in the mid-19th century. The environmental movement (sometimes referred to as the ecology movement) is a social movement that aims to protect the natural world from harmful environmental practices in order to create ...