Also, no one knows how destroying the rainforests will change the earth. We know that less rain will fall once the trees are gone. That may cause some rivers, which supply water to cities around the rainforest, to dry up during part of the year. Also, burning trees puts carbon into the air. Carbon absorbs heat from the sun. Will the burning of so many trees change the air and make the climate on the earth warmer? Experts are arguing about it, but it might be happening.