I-General: Nowadays, the environment pollution has been a serious problem to the whole world since it’s getting worse and worse. There are many kinds of pollution like water pollution, air pollution or soil pollution. Today, our group would like to talk about the air pollution problem. As you can see, every day, a person inhales about 20,000 liters of air. Every time we breathe, we risk inhaling dangerous chemicals that have found their way into the air. Air pollution includes all contaminants found in the atmosphere. These dangerous substances can be either in the form of gases or particles. Air pollution can be found both outdoors and indoors. Pollutants can be trapped inside buildings and that’s why it usually lasts for a long time. II-Causes: There are many different chemical substances that contribute to air pollution. These chemicals come from a variety of sources. Air pollutants have sources that are both natural and human. Forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds, and natural radioactivity are all among the natural causes of air pollution. Though some pollution comes from these natural sources, most pollution is the result of human activity. The biggest causes are the operation of fossil fuel-burning power plants and automobiles that combust fuel. Combined, these two sources are responsible for about 90% of all air pollution in the United States. III-Effects: Air pollution is responsible for major health effects. Every year, the health of countless people is ruined or endangered by air pollution. Many different chemicals in the air affect the human body in negative ways. Just how sick people will get depends on what chemicals they are exposed to, in what concentrations, and for how long. Studies have estimated that the number of people killed annually in the US alone could be over 50,000. Some cities suffer severely because of heavy industrial use of chemicals that cause...
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