OUR PLANET
Greenhouse Effect: The earth heats, because a small part of solar energy is absorbed, another is returned to space, and the last part arrive to earth and heats the surface.
Ozone Layer: The ozone layer protect the world for the ultraviolet ray. The layer is affected for the Chlorofluorocarbons.
Radiation: Nuclear plants produce a small pieces of waste. But the pricipal danger is a nuclear accident, Chernobyl 1986.
Credits: Wikipedia , Greenhouse effect.
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