Question

Which of the following is TRUE of greenhouse gasses?

A. Once released into the atmosphere CO2 can remain for many years.
B. Greenhouse gasses that trap heat are primarily found in the stratosphere
C. Without greenhouse gasses and the greenhouse effect the planet would be much warmer than it is today.
D. The current level of greenhouse gasses is higher than at any time in the history of the planet.
E. Human activities are the source of all greenhouse gasses

Answer 1

The TRUE statement about greenhouse gases is:

C. Without greenhouse gases and the greenhouse effect, the planet would be much warmer than it is today.