Humans became more selfish. Humans started to kill the nature. The ozone got holed. Now the trees being killed. Humans out there are being selfish and eating up all the trees. They take it and sell for much greater than price. But they don't know the price of nature, they really don't know what is our mother nature gives. All the trees are cut down and became books that we read. All the trees cut down and became rubber and pencil that we use to put our diagrams. You this is cool. Not at all. Loss of trees needs to soil erosion. Please make people to aware the consequences of deforestation. Go through media if possible politics.