English Language · English
Aerosols in the atmosphere can affect climate. Aerosols are microscopic particles suspended in the air for days to weeks. Human activities contribute to emissions of these substances, alongside natural sources like volcanoes. Unlike greenhouse gases, climate effects of aerosols vary depending on composition and location. Aerosols that reflect sunlight have a cooling effect, whereas those that absorb sunlight, like black carbon, have a warming effect by absorbing solar and infrared radiation. What is the main idea of the passage?
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- 1Black carbon aerosols contribute to warming by absorbing both solar radiation and infrared radiation.
- 2Aerosols have a complex impact on climate depending on their composition and source.✓
- 3Aerosols have a cooling effect on the climate as they reflect sunlight.
- 4Aerosols mainly affect air quality and visibility, not global climate.
Correct answer
Aerosols have a complex impact on climate depending on their composition and source.
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