What is a consequence from a "Human Enhanced Greenhouse Effect" caused from burning fossil fuels?
It removes carbon dioxide from the atmosphere.
It adds carbon dioxide to the atmosphere that was never present in the atmosphere.
It adds carbon dio: to the atmosphere that has not been present for millions of years.
It makes photosynthesis harder for plants.

I think the answer is C. It adds carbon dioxide to the atmosphere that was never present in the atmosphere.

Explanation:

Well let's see, CO² is carbon dioxide, and it has been around practically since the earth has been made.

But burning fossil fuels adds to the already natural levels of CO² in the air. So this answer makes the most sense. CO² also causes a greenhouse effect.

a. by using fur or clothes to trap heat energy near the body