Question

The passage emphasizes human-caused emissions. Fossil fuel burning is the main factor. Natural causes are mentioned only historically, not currently.

• A. Sulfur dioxide and particulate matter
• B. Carbon dioxide and methane
• C. Nitrous oxide and chlorofluorocarbons
• D. Water vapor and naturally occurring methane

Answer 1

Answer:

B. Carbon dioxide and methane

• Greenhouse gases trap heat in the atmosphere.

• CO₂ and CH₄ are specifically named.

• Oxygen/nitrogen are abundant but not heat-trapping in the same way.