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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.
Learn about the sources, impacts and history of smog in Canada. Smog is a mixture of gases and particles that affects health and the environment, especially in summer and winter.
4 days ago · Smog is polluted air that results from various sources of smoke and fog. Learn about the two main types of smog: sulfurous and photochemical, and how they affect the environment and health.
- 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.
Jun 5, 2023 · Smoke from wildfires in Ontario and Quebec has made Ottawa's air quality the worst among Canada's major cities. Environment Canada warns that the air quality may remain dangerous for days and advises people to reduce outdoor activities and exposure.
Smog is a mixture of harmful gases and particles that can cause respiratory and cardiovascular problems. Learn about the sources, types, and symptoms of smog and how to protect yourself from it.
Learn about the sources, effects and costs of outdoor air pollution in Canada, including smog, ozone, particulate matter and wildfire smoke. Find out how to minimize the health impacts and contact us for more information.
