It is described as "Theory that the average temprature of Earth is rising as a result of increased amounts of carbon dioxide
in the atmosphere chiefly from the burning of fossil fuels and from other human activities."
Earth has warmed by about 1ºF over the past 100 years, and is slowly rising. A warmer Earth can lead to changes in rainfall
patterns, a rise in sea level, and a wide variety of impacts on plants, wildlife, and humans.
Green House Gas Effect
The earth recieves most of it's energy, called radiation, from the sun. This energy is electromagnetic radiation in the visible
spectrum, with small amounts of infared radiation and UV radiation. The solar energy has a very short wavelenght and passes
through the atmosphere gases un affected to reach the earth's surface. The earth's surface absorbs the solar energy and releases
it back to the atmosphere as infared radiation (IR), some of which goes back into space.