This is 1 reason why the rainforests are so important - they're places the planet can store lots and lots ofcarbon. Sunglasses For Earth Earth is bathed in light and other energy from the sun all the time. Not all of that energy is healthy. One kind of energy that's not good is called ultraviolet radiation usually we say UV or UV-rays for short. High up in the air at the edge of space is a special kind of oxygen called ozone.
Ozone is a fragile chemical, but it's just the right size and shape to absorb the UV from the sun.
But the ozone seems to be being destroyed by chemicals called CFCs. They are used in refrigerators , to puff up plastic foam, and lots were used in spray cans. Spray cans in the U.S.A. no longer use CFCs. The next time you hear someone mention ozone in the same sentence with trees and the greenhouse effect, politely explain that they're separate things. Tell them all about planets with sunglasses and planets in closed jars.