Humans are not only living things on the earth. We share it with millions of other plants and animals. They live in every part of the world from deepest ocean to the top of the highest mountains. Some plants and animals are huge and some are so short that you need a microscope to see them. The life of animals is so complicated that we call them a "balance of nature". But the matter is that there are more creatures in this world with the humans. And we are destroying them. We are cutting trees and hunting animals only to full fill our needs. But in order to full fill our needs we must notice that rather we are not destroying other's need. We must notice thatall living things have right to live or survive. Hunting and cutting is the main problem of this world. Firstly we have 100,000 tigers but from year 2000 we have just 5000 to 7500 tigers. It is just because of the less supply of food. And it is all about the human activity. So we have to do something to stop it. We have to take first step other will take second.