There are many factors that cause pollution at present. First of all, the most important cause is the air pollution because humans must to breathe. If this problem is not solved, will cause risk causing disease, harmful into Earth's atmosphere ,and toxic fumes from industrial factory. Next, high noise levels to effects in humans and animals. Increase in stress can cause hazard to death. Finally, there are several types such as water and soil pollution. If do not help each other solve problems. Are harmful to humans and the environment in the future.