All energy sources that exist on Earth comes from the Sun. Most of the energy in the form of short-wave radiation, including visible light. When this energy is reached the Earth's surface, it changes from light into heat that warms the Earth. The earth's surface will absorb some of the heat and reflect the rest. Some of this heat is tangible long-wave infrared radiation into space. However, most of the heat remains trapped in the Earth's atmosphere due to accumulated amount of greenhouse gases include water vapor, carbon dioxide, sulfur dioxide and methane into the trap wave radiation. These gases absorb and reflect radiation emitted by the Earth and consequently heat will be stored on the surface of the Earth. This situation occurs continuously, resulting in an annual average temperature of the earth continues to rise.
These gases may act as a greenhouse gas. With increasing concentrations of these gases in the atmosphere, the more heat is trapped beneath it.
The greenhouse effect is needed by all living things on earth, because without it, the planet would be very cool. With an average temperature of 15 ° C (59 ° F), the earth actually had more hot 33 ° C (59 ° F) from the original temperature, if there is no greenhouse effect of the earth's temperature is only -18 ° C so that the ice will cover the entire the Earth's surface. However, on the contrary, if these gases in the atmosphere has been excessive, will cause global warming.
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