The greenhouse effect

The atmosphere is the gas layer surrounding the Earth. It consists of a series of gases that play a very important role in moderating the temperature at the land surface.
The atmosphere works like a greenhouse, that is no longer spend part of solar radiation, but prevent the land leaving radiation into space. The gases that constitute this layer doesn’t leave out the solar radiation are: water vapor, carbon dioxide, CFC, etc., is called the greenhouse effect gases.
But we, humans, we are doing that with the greenhouse effect increase, because the human activity and pollution, so that there is a greater concentration of gases in the atmosphere, soon more the greenhouse effect.
This goes bring serious consequences to the planet, such as: the melting, the change of climates, the temperature increase, soon the rise in sea level and in turn the consequences will connect to global warming.

P.S. Some ideas of the book "GEO Environment and Society."