Deforestation

By deforestation we understand the destruction on great scale of the forest by the human action. The deforestation is not just like the forest degradation that consists of the reduction of the quality of the forest. Both processes are related and produce diverse problems. They can produce erosion of the ground, which favors the floods or droughts as well. They reduce the bio diversity, which is mainly significant in the rain forests, which lodge good part of the bio diversity of the world. The forests play a key role in the storage of CO2; if they are eliminated, the excess of CO2 in the atmosphere can take to a global Earth heating. On the tempered regions agriculture was based on the elimination of the forests taking advantage of the fertility of its grounds. Most of tropical forest grounds are much less fertile than those of tempered regions and are easily subject to erosion due to the high rainfall that prevents the accumulation of nutrients in the ground. However, the colonial ideas were based on the mistaken assumption that an exuberant forest meant fertile grounds. The increasing deforestation not only eliminates the natural polinization, but also increases to the levels of CO2. The equivalent to a football ground of rain forest surface is destroyed every minute that passes.:

The cause of deforestation is  very complex. A competitive economy creates the need for money in poorer third world countries. The governments sell logging concessions to pay international debt, or to develop industry. Brazil had an international debt of $159 billion in 1995 ("BSRSI").