The indiscriminate felling of forests is one of the worst human practices in effect for the entire biosphere. On the slopes, is the main cause of drag of land, which leads to elevated river beds by the accumulation of earth dragged the channel being blocked and causing flooding in a row. Swamps are also filling of land, shortening the life of dams.

These environmental impacts are added damage to the Flora and Fauna, irreparable when it comes to ancient forests with abundant endemic species unable to reproduce in new conditions after harvest. Currently, we have cleared 50% of tropical forests in America, 85% in Africa and 75% in Asia. The effects of deforestation are particularly dramatic when it comes to tropical forests, given the fragility of these ecosystems.

Among the motives that lead to deforestation, two are particularly critical: the exploitation of tropical hardwoods, which are in great demand by the furniture industries in industrialized countries and the need of local populations to increase the areas of crop and pasture for livestock. In any event, the tropical forest floor once treeless, suffers high erosion due to heavy rain and strong sunshine, desertified easily not only by the loss of nutrients and humus caused by rapid oxidation, but also because of the greater dryness of the environment that brings cutting, as in tropical rainfall are largely generated by the vegetation.

Currently the land is exploited to the total destruction of the soil. In such conditions, tropical soils, rich in ferrous materials, long-term suffering laterization, ie the surface forming a tough crust and uncultivable, which does not hold any water. At this point, the soil needs thousands of years to recover.