答案：Our world is badly polluted. People cut down a large numberof trees and forests to build many farms and buildings . Many animals have no places to live, their survival space is less and less . Besides, hunters kill animals for money, a lot of wild animals are in danger now.The earth is becoming more and more warm, natural disasters often happens. So we must do something to protect our earth. We shouldn’t eat wild animals or buy clothes made of animal fur . We can plant more trees. In our daily life we should not litter anywhere. Our government shoud make some laws to protect the animals and the environment It is our duty to protect our earth. I think no matter where we live, we should keep our neighborhood tidy and clean. We shouldn’t spit in public place. If we all try our best to protect the earth, it will become more and more beautiful.