Environmental problems are becoming more and more serious all over the world. For example, cars make the air bad for people to breathe, and factories emit toxic gases. Trees on the mountain are cut down, and wastewater is continuously discharged into rivers. Besides, no matter where we go, we can find that garbage is thrown away at will. In fact, pollution is threatening our survival.

The earth is our home, and we have the responsibility to take good care of it for ourselves and our future generations. Fortunately, more and more people have realized these problems. The government has taken measures to solve these problems. Laws have been passed to stop pollution. I hope the problem can be solved in the near future and our home will become better and better!