Addition of harmful substances to the atmosphere resulting in damage to the environment, human health, and quality of life. Homes School Cities Across Continents Globally Air pollution makes people sick It harms plants, animals, and ecosystems in which they live. It returns to earth in the form of acid rain and snow. Pollution is changing earths atmosphere. Scientist predict that the temperature increase, referred to as global warming. Alter sea level, make weather more extreme, and increase the spread of tropical disease.Factory smoke darkens the sky above Czech Republic. The Czech Republic faces a severe air pollution problem that is choking the nations land. Air pollution and subsequent acid rain has killed or damaged many of the countrys trees and badly degraded its soil. Most air pollution comes from human activity. Some of air pollution also come from natural sources. Forest fires emit particulate sand VOCs into the atmosphere Volcanoes spew out sulfur dioxide and large amounts of pulverized lava rock known as volcanic ashAutomobile Traffic Pollution Automobile exhaust contains unburned hydrocarbons, particulates, carbon dioxide, and oxides of nitrogen and sulfur that contribute to acid rain, smog, and global warming. The oxides combine with water vapor in the air to form acids, which return to the ground as acid rain. Smog, a mixture of smoke and fog, irritates the eyes, throat, and lungs and also damages plants. Carbon dioxide, produced from the burning of fossil fuels including gasoline, is the leading cause of the greenhouse effect, a phenomenon thought to be responsible for rising global temperatures.The chemical pesticide DDT was used around the world from the 1940s through the early 1970s to kill crop-eating and disease-carrying insects. In the early 1960s studies began to show that the chemical caused reproductive problems in animals and that it often disrupted the food chain. The use of DDT was banned in the United States in 1973.How can we stop air pollution Stop producing it in the first place. Government can pass laws that forbid or limit the use off chemicals that cause pollution. Build cars that burn less gasoline. Recycling helps cut down on pollution. Drive your car less. Instead of driving, walk, bike, take public transit, or carpool. Don't smoke. Smokers are polluting the air. Turn off lights when you leave the room. The electricity plant likely puts pollution in the air. If you don't use as much electricity, they don't have to make as much. Adding plants and trees to the surrounding environment