In recently, my county have many cars which is origin of air pollution, and therefore it effect to life. The first, air is danger to health, especially respiration system, nerve system, cancer skin and it may accumulate in issue of body. The second, there are some toxic fumes from cars which levitate in atmosphere so long and circulate so far, there are some toxic fumes which react or become new substance. The third, it cause acid rain. So acid rain is danger which affect organism and building. The last, it cause Greenhouse effect. When it levitate and up to atmosphere. It spread over UV from surface of earth and result heat and UV are transferred outside atmosphere of earth less. So surface and atmosphere of earth have temperature higher.