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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 to refer to smoky fog due to its opacity, and odor.
May 13, 2024 · Smog is polluted air that results from various sources of smoke and fog. Learn about the two main types of smog: sulfurous smog and photochemical smog, and their effects on health and environment.
- The Editors of Encyclopaedia Britannica
Smog is a mixture of smoke, gases, and chemicals that pollutes the air and harms health. Learn how to use the word smog in sentences and find out how to say it in different languages.
Oct 19, 2023 · Smog is air pollution that reduces visibility. The term "smog" was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from burning coal. Smog was common in industrial areas, and remains a familiar sight in some cities today. Today, most of the smog we see is photochemical smog.
Aug 24, 2021 · Smog is a visible form of air pollution that often appears as a thick haze. Look toward the horizon during daylight hours, and you can see how much smog is in the air.
- Larry West
4 days ago · Learn about the sources, impacts and solutions of air pollution on health and climate. Find WHO data, guidelines, tools, initiatives and publications on ambient and household air quality.
Oct 31, 2023 · Learn how air pollution harms human health and the planet, and what are the main sources and types of pollutants. Smog, soot, hazardous air pollutants, and greenhouse gases are among the most common and harmful air pollutants.
