The greenhouse effect caused by rising concentrations of carbon dioxide (CO2) and other gases in the atmosphere. The increase in CO2 concentration is caused by increased burning of fuel oil, coal and other organic fuels which exceed the ability of plants and oceans to absorb them.

Energy into the Earth:

* 25% reflected by clouds or other particles in the atmosphere
* 25% absorbed by clouds
* 45% absorbed by the earth’s surface
* 5% reflected back by the earth’s surface

The absorbed energy reflected back in the form of infrared radiation by the clouds and the earth’s surface. But most of the infrared emitted by the clouds and the earth retained CO2 and other gases, to be returned to the earth’s surface. Under normal circumstances, the greenhouse effect is required, with the greenhouse effect temperature difference between day and night on earth is not too much different.

Besides CO2, which can cause the greenhouse effect is sulfur dioxide, nitrogen monoxide (NO) and nitrogen dioxide (NO2) and some organic compounds such as methane and chlorofluorocarbons (CFCs). These gases play an important role in enhancing the greenhouse effect.