Smog | Description, Causes, Effects, & Types | Britannica
WEBMar 26, 2024 · Smog, community-wide polluted air. Although the term is derived from the words smoke and fog, it is often used to describe the pall of automotive or industrial origin that lies over many cities, and its composition is variable. At least two distinct types of smog are recognized: sulfurous smog and photochemical smog.
Smog - Wikipedia
WEBSmog, 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.
Smog - National Geographic Society
WEBOct 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.
AirNow.gov
WEB2024-02-07. EPA has updated the Air Quality Index (AQI) for particle pollution, at the same time the Agency updated the annual health-based standard for this harmful pollutant. AirNow will reflect the updates when they become effective -- 60 days after the rule is published in the Federal Register. Read about the AQI updates.
Learn About the Causes and Effects of Smog - Treehugger
WEBAug 24, 2021 · Smog is made up of a combination of air pollutants that can compromise human health, harm the environment, and even cause property damage. Smog can cause or aggravate health problems such as...
What Causes Smog? - Caltech Science Exchange
WEBThe main components of photochemical smog, the hazy air pollution that can blanket Los Angeles and other urban areas, are ground-level ozone and particulate matter. Credit: Lance Hayashida for Caltech Science Exchange.
Smog, Soot, and Other Air Pollution from Transportation
WEBApr 25, 2024 · Air pollution emitted from transportation contributes to smog, and to poor air quality, which has negative impacts on the health and welfare of U.S. citizens. Pollutants that contribute to poor air quality include particulate matter (PM), nitrogen oxides (NO x), and volatile organic compounds (VOCs).
Air Pollution: Everything You Need to Know - NRDC
WEBOct 31, 2023 · Smog (sometimes referred to as ground-level ozone) occurs when emissions from combusting fossil fuels react with sunlight. Soot—a type of particulate matter—is made up of tiny particles of...
Air pollution - World Health Organization (WHO)
WEBSep 5, 2023 · 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 is causing fine particulate matter which result in strokes, heart diseases, lung cancer, acute and chronic respiratory diseases.
Air Pollution | CDC - Centers for Disease Control and Prevention
WEBDec 21, 2020 · Air Pollution. Climate change is projected to harm human health by increasing ground-level ozone and/or particulate matter air pollution in some locations.
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