The newspapers we read and the textbook we use are all made from the trees. Thus the increase in the world's populations can affect the rainforest. More wood productions are required for the larger populations. After the destruction of the rainforest, many effects appeared. Global warming is the one of the obvious effects of the deforestation.
Trees make food by photosynthesis which can absorb the carbon dioxide and release the oxygen.
Trees are cutting down and there are less trees to produce the oxygen. Just think about the Christmas in New York City, it supposes to snow, but it doesn't and the Yew Year' s too. Actually some trees are blooming. Some people call rainforest the air condition of the planet earth. The other effect of the deforestation of rainforest is destruction of habitat and cause many species disappeared from the earth.