Currently in my community, which is many cars which cause of air pollution. Resulted in many subsequent effects. Firstly, there is the toxic air are harmful to health, especially the nervous system, respiratory system, skin cancers, and may accumulate in body tissues. Secondly, the toxic substances released to atmosphere. Some species persist in the atmosphere for a long time and spread out to the remote. Some type of reaction is the same as a dangerous new substances. Thirdly, causing acid rain acid rain, so there will be aggressive. Which is harmful to living things, and the buildings. The last causing the greenhouse effect. When it ascends on the atmosphere. To cover the heat radiation from the surface of the Earth up to the higher atmosphere cooled. So surface and atmosphere of earth have temperature higher.