Humans have caused much damage to tropical rainforests around the world. Deforestation is a wide spread problem in all parts of the world. The trees are valuable for wood and paper products and the cleared land is used for farming and cattle. The soil, that is already lacking in nutrients, soon becomes completely infertile, forcing the farmer to move. More of the forest is once again cleared and the process is repeated.
News Articles on Deforestation in Tropical Rainforests:
http://www.nytimes.com/2009/01/30/science/earth/30forest.html?_r=1&ref=rainforests
http://earthobservatory.nasa.gov/Features/Deforestation/