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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]
6 days ago · Smog is a term for polluted air that can be caused by various sources and reactions. Learn about sulfurous smog, photochemical smog, and their impacts on human health and environment.
- The Editors of Encyclopaedia Britannica
Oct 19, 2023 · Learn what smog is, how it forms, and why it is harmful to humans and the environment. Find out about the history, causes, and effects of smog in different cities and countries.
Aug 24, 2021 · Smog is a mixture of air pollutants that form ozone near the ground and affect human health and the environment. Learn how smog is produced, where it occurs, and how to recognize it.
- Larry West
AirNow.gov provides current and forecasted air quality data for ozone and PM, as well as wildfire smoke and other pollutants. You can search for a U.S. location or use your device location to get air quality information and alerts.
Learn how ozone and particulate matter, the main components of smog, are formed by chemical reactions involving VOCs and nitrogen oxides in the presence of sunlight. Find out how smog affects human health, the environment, and what we can do to reduce it.
Apr 25, 2024 · EPA implements national programs and standards for fuels and vehicles that reduce air pollution including smog, soot, and toxic pollutants, and spur investments in clean vehicle and engine technology.