Multiple choice

What happens when CO2 & other greenhouse gases increase in our atmosphere?

  1. Average global temperatures decrease

  2. Average global temperatures increase

  3. The Earth's magnetic field changes direction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Greenhouse gases trap heat radiating from the Earth's surface that would otherwise escape into space. When the concentration of these gases increases, more heat is retained, leading to an increase in average global temperatures.

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