Unfortunately people don’t take care about nature and use all resources. It would lead to negative consequences in future. There are some global problems like drought, smog, water and even air pollution. Nowadays air pollution has became a real catastrophe especially in China. Because of a big amount of factories which emit smog plants, animal and also people are in danger of serious diseases. But we can change it. Many scientists try to solve this problem and make air clearer. They create new equipment like special filters and another of this kind and we also can make a contribution. For example: less use the car, go on foot or use public transport.