Question

How does carbon dioxide contribute to the greenhouse effect?

Answer 1

It is a greenhouse gas.

Explanation:

Instead of answering this question again I am going to post links to other answers.

https://socratic.org/questions/what-causes-the-greenhouse-effect?source=search

https://socratic.org/questions/what-effect-can-greenhouse-gases-have-on-climate?source=search

https://socratic.org/questions/what-role-does-carbon-dioxide-play-in-the-greenhouse-effect?source=search