Global warming is the heating of the earth. This heating occurs because of the greenhouse effect. The greenhouse effect is when carbon dioxide and other gases (methane and nitrous oxide) trap energy from the sun in our atmosphere. Most of the energy we receive from the sun is absorbed by the surface of the earth. Some of the energy is reflected and would normally exit our atmosphere; however, carbon dioxide absorbs this energy and it …showed first 75 words of 1494 total…

…showed last 75 words of 1494 total…