Multiple choice

Which of the following is/are true?

  1. The increase in percentage of carbon monoxide in air causes global warming.

  2. The increase in percentage of carbon dioxide in air causes global warming.

  3. The increase in percentage of methane in air causes global warming.

  4. Both (2) and (3).
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The increase in percentage of CO2 and methane causes global warming and raises the temperature of the earth.

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