Outdoor air pollution is one of the world's largest health and environmental problems – one that tends to worsen for countries as they industrialize and transition from low to middle incomes. …

The term was coined from the terms “smoke” and “fog” referring to a brownish haze that pollutes the air, greatly reducing visibility and making it difficult for some people to breathe (Figure 6.9 …

Jan 7, 2025 · Use the tools on this site to access recent and historical data. During fire events, use the Fire and Smoke map. The daily air quality tracker lets you compare recent AQI values …

Whether it comes from your car's exhaust pipe, dirty smokestacks or a forest fire, air pollution can be deadly. Learn about outdoor air pollutants and the sources of pollution and how they can …

Oct 24, 2024 · Ambient (outdoor) air pollution in both cities and rural areas was estimated to cause 4.2 million premature deaths worldwide per year in 2019; this mortality is due to …

Jan 27, 2025 · From smog hanging over cities to smoke inside the home, air pollution poses a major threat to health and climate. Ambient (outdoor) air pollution in both cities and rural areas …

Smog is a mixture of air pollutants (sulfur dioxide, nitrogen oxides, ozone, and particulates) that often form over urban areas as a result of fossil fuel combustion.

Dec 5, 2024 · Outdoor air pollution is made of chemical particles. When smoke or other pollutants enter the air, the particles found in the pollution mix with the air. Air is polluted when it contains …

Chemical reactions in the atmosphere between NOx and VOCs produce ground-level ozone, a component of smog. Naturally occurring sources of pollutants include disasters such as …

Aug 23, 2018 · The three key sources of air pollution deaths are from the indoor burning of solid fuels (indoor air/household pollution), exposure to ambient outdoor ozone (O3), and ambient …