Excluding water vapour, greenhouse gases make up _____ percent of the atmosphere.

Question

Quizplus · Accepted Answer

The most abundant greenhouse gas in the atmosphere is actually water vapour, which accounts for around 70% of the total greenhouse effect. Of the remaining greenhouse gases, carbon dioxide (CO2) is the most significant, but it makes up only about 0.04% of the atmosphere. Methane (CH4), nitrous oxide (N2O), and fluorinated gases make up even smaller percentages. Therefore, excluding water vapour, greenhouse gases make up less than 1% of the atmosphere, so the correct answer is D.

Excluding Water Vapour, Greenhouse Gases Make Up _____ Percent of the Atmosphere