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1. The human   is only one small species in the living world. Many other species exist on this planet. However, human beings have a great   on the rest of the world. They are changing the environment by building cities and villages where   once stood. They are affecting the water supply by using water for   and agriculture. They are changing weather conditions by cutting   trees in the forests. And they are destroying the air by adding pollutants to it.
It can be said that human beings are changing the environment in all   through their actions and by their  . This has resulted in two serious consequences. The first is that many kinds of rare animals are  . The second is that the environment where these animals are living is badly destroyed. As a result, the number of rare animals is decreasing so   that they are in danger of becoming extinct.