Which gas released by burning fossil fuels is the largest contributor to human-caused climate warming?

Answer and explanation

Correct answer: D. Carbon dioxide

  1. Step 1: Combustion of carbon-containing fuels forms carbon dioxide. Step 2. It is a greenhouse gas and accumulates in the atmosphere. Answer: carbon dioxide. Why not the others: the others are not greenhouse gases of concern here.

Practise more Physics and Earth Science.

Free questions with an explanation for every one, and full timed Ontario Secondary School Diploma (OSSD) mock tests.