When these activites are performed more greenhouse gases are being sent into the air. When you think about how many times a day you do any of these things and then how many other people do the same activites, that is alot of electricty being used, so there is alot of pollutes being sent into the air.

Other causes that are not so common for everyday life but still have a large impact on the causes of global warming are, landfills and the cutting down of trees. Landfills are places where garbage is thrown and then most of the time is burned to be disposed of. When the garbage is burned an enormous amount of greenhouse gasses into the air and makes global warming worse.

Another thing that makes global warming worse is when people cut down trees.  Trees and other plants collect carbon dioxide (CO2), which is a greenhouse gas.

Carbon dioxide is the air that our body lets out when we breathe. With fewer trees, it is harder for people to breathe because there is more CO2 in the air, and we don’t breathe CO2, we breathe oxygen.  Plants collect the CO2 that we breathe out, and they give back oxygen that we breathe in.  With less trees and other plants, such as algae, there is less air for us, and more greenhouse gases are sent into the air.

http://library.thinkquest.org/CR0215471/global_warming.htm

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