TED-Ed: The science of smog - Kim Preshoff

The video explores the history and science of smog, focusing on its impact in Los Angeles in 1943. It explains the difference between industrial and photochemical smog, highlighting the role of VOCs and nitrogen oxides. The video discusses how weather, geography, and temperature inversion contribute to smog formation. It also covers the health and environmental impacts of smog, including respiratory issues and crop damage. Historical responses, such as the Clean Air Act, and modern challenges in countries like China and Poland are examined. The video concludes with potential solutions, like mass transit and reducing fossil fuel use.

What was the initial reaction of Los Angeles residents to the smog in 1943?

• They ignored it as a minor issue.

• They celebrated it as a weather event.

• They believed it was a chemical attack.

• They thought it was a natural phenomenon.

Which compounds are primarily responsible for the formation of photochemical smog?

• Ozone and carbon monoxide

• Methane and ammonia

• Volatile Organic Compounds and nitrogen oxides

• Carbon dioxide and sulfur dioxide

What environmental condition contributes to the trapping of smog in cities like Los Angeles?

• Frequent rainfall

• Low humidity

• Temperature inversion

• High wind speeds

How does smog affect human health?

• It causes eye irritation and respiratory issues.

• It has no significant health effects.

• It improves lung function.

• It enhances immune response.

What was a significant outcome of the Great Smog of London in 1952?

• Increased coal production

• The Clean Air Act of 1956

• A rise in tourism

• The invention of air purifiers

Which countries are currently facing high levels of industrial smog due to coal dependency?

• Australia and New Zealand

• Canada and Sweden

• China and Poland

• Brazil and Argentina

What is a potential solution to reduce smog in rapidly developing cities?

• Building more coal power plants

• Promoting mass transit and reducing car usage

• Increasing fossil fuel usage

• Encouraging urban sprawl