Multiple choice

Which of the following is a major green house gas?

  1. Carbon dioxide

  2. Chloro fluorocarbon

  3. Carbon monoxide

  4. Freon
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A Correct answer
Explanation

Carbon dioxide (CO2) is the most significant anthropogenic greenhouse gas, contributing approximately 76% of all greenhouse gas emissions from human activities. It is released primarily from burning fossil fuels. Chlorofluorocarbons are potent greenhouse gases but exist in much smaller quantities. Carbon monoxide is not a greenhouse gas. Freon is a brand name for CFCs.

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