Multiple choice general knowledge science & technology

In 2009, which chemical was the largest ozone-depleting substance emitted through human activities?

  1. Carbon Dioxide

  2. Methane

  3. Nitrous oxide

  4. Carbon Monoxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

By 2009, after CFCs had been largely phased out due to the Montreal Protocol, nitrous oxide became the largest ozone-depleting substance emitted by human activities. N2O is both a potent greenhouse gas and contributes to stratospheric ozone destruction.

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