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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
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.
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.
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
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.
Oct 25, 2022 · Here, we’ll go into what causes smog, the health effects of smog, and what you can do to protect yourself. What is smog? The term “smog” was coined in the early 1900s to describe the mix of smoke and fog caused by burning coal in industrial areas.
