Question

Why is it commonly believed that carbon dioxide is responsible for global warming?

1.Carbon dioxide levels in the Earth’s atmosphere have been steadily decreasing.

2.Carbon dioxide has a longer average lifetime in the atmosphere.

3.The warming effect associated with carbon dioxide has remained unchanged.

4.Other greenhouse gases amplify the effect of carbon dioxide.

Answer 1

2. Carbon dioxide has a longer average lifetime in the atmosphere.

Step-by-step explanation:

I do not personally believe carbon dioxide is the cause of warming as it takes up less than 1% of the atmosphere but I am giving you this answer because I have seen this question before and this is what the book deemed was the "correct" answer,