Multiple choice

Which one of the following is a major green house gas?

  1. Carbon dioxide

  2. Chloro fluorocarbon

  3. Carbon monoxide

  4. Freon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon dioxide (CO2) is the primary greenhouse gas responsible for global warming, contributing about 76% of all greenhouse gas emissions from human activities. While CFCs are also greenhouse gases with high global warming potential, CO2 is by far the major one in terms of total emissions and overall impact.

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