Search results
Mar 3, 2019 · Smog is a type of air pollution caused by the interaction of sunlight with certain chemicals in the atmosphere. Learn how smog affects your health, how to check the air quality index, and how to avoid smog exposure.
Smog formation in general relies on both primary and secondary pollutants. Primary pollutants are emitted directly from a source, such as emissions of sulfur dioxide from coal combustion. Secondary pollutants, such as ozone, are formed when primary pollutants undergo chemical reactions in the atmosphere.
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 how they affect the environment and health.
Smog is mainly made of ground-level ozone and particulate matter. Here, Caltech scientists explain the smog formation process.
Feb 2, 2023 · Learn how photochemical smog is formed when nitrogen oxides and volatile organic compounds react with sunlight, and what are its harmful effects on human health and environment. Find out how to prevent or reduce photochemical smog with some simple measures.
Oct 19, 2023 · 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. Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere.
Aug 24, 2021 · Smog is a mixture of air pollutants— nitrogen oxides and volatile organic compounds —that combine with sunlight to form ozone. Ozone can be beneficial or harmful depending on its location.
