What is pollution? Smoke, dirty water, rubbish and so on. Some pollution is easy to be seen like smoke, but much of pollution is not obvious(明显的) at all, yet you're eating it, drinking it or breathing it most of the time. Pollution is everywhere. It makes humans, animals and plants sick and it even kills them. It's even making the climate change. (A) What's worse is that pollution has caused many problems to all life on the earth. There's nowhere on the earth left with no pollution, not even the sea or the air.

(B) Environmental problems are becoming more and more serious all over the world. People have realized these problems. Humans make the pollution and they should try to stop it, especially you, because the future is yours! We should protect our home. I hope the problems of pollution will be solved in the near future and our home will become better and better.