"'The Greenhouse Effect'..." by James Kerwin Photographic is licensed under CC BY-NC 2.0
Without the greenhouse effect, Earth’s temperature would be below freezing. It is, in part, a natural process. However, Earth’s greenhouse effect is getting stronger as we add greenhouse gases to the atmosphere. That is warming the climate of our planet.
"Greenhouse Gases" by CECAR - Climate and Ecosystems Change Adaptation R is licensed under CC BY 2.0
Gases that trap heat in the atmosphere are called greenhouse gases.