Multiple choice general knowledge science & technology

What is known as the 2nd green house gas?

  1. methane

  2. sulfur

  3. carbon dioxide

  4. oxygen
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A Correct answer
Explanation

Carbon dioxide is the primary greenhouse gas, while methane ranks second in both atmospheric concentration and warming potential among greenhouse gases emitted by human activities. Methane traps about 25 times more heat per molecule than CO2 over a 100-year period, making it a significant contributor to climate change despite lower concentrations.

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