Global Warming

Global warming is the extraordinary increase of Earth's surface temperature due to the increase of greenhouse gases concentration on the atmosphere. Greenhouse gases are the heat-trapping gases in the atmosphere (carbondioxide, methane, nitrous oxide, and CFC). They are the fundamental parts of the greenhouse effect,  the role played by the atmosphere to continually warm the earth, by trapping some portions of heat that came from the solar energy (sun radiation) from reflecting back to space --- just like the work of a greenhouse.