Nearly thirty percent of the rain that falls in the rainforest’s are recycled into the atmosphere. This evaporation helps cool the surface of the earth and allows for tropical rain fall. If deforestation keeps on continuing, models predict that the tropical areas of the world will become more hot and dry. Models also stipulate that the disruption of the natural evaporation process will also affect other areas of the world, such as China, Northern Mexico, and south-central United States. In just the Amazon, scientist predict that the trees there contain more than 10 years worth of greenhouse gases produced by humans. When people clear forests for farming and commercial purposes the carbon that was residing in the wood is then released into the atmosphere, increases greenhouse gases and global warming.