Due to industrial emissions, car exhaust and the life of exhaust gas produced by any of a variety of emissions, we had blue sky became cloudy, the survival of our environment has given us greater health hazards. Greenhouse effect, acid rain, ozone hole, the pressure of always invisible to us, as the greenhouse effect caused by rising sea levels, coastal low-lying areas were flooded and then can be used to reduce the human, as well as acid rain corrosion of buildings, soil acidification, and ozone hole UV damage we suffered, it is more susceptible to skin cancer, and that the gas was sucked into the body, over time can also cause a variety of diseases, many of these have shown the importance of environmental protection.