Acid rain is any type of precipitation that has high acid content. This precipitation can be wet (rain, snow, or fog) or dry (gases or acidic salts). Normal rain is slightly acidic with pH 6.5 but we call it acid rain when it is pH is between 2 and 5.5. It is formed by chemicals created by the burning of fossil fuels, power plants, factories and auto mobiles. These chemicals are sulfur dioxide and nitric oxide. Sulphur dioxide and nitric oxide react with water in the atmosphere and eventually fall back to earth’s surface as an acid deposition.
Shanghai is a city which is located on eastern coast of China. It is a strong commercial and industrial base city in China. Most of industries in Shanghai use 80 percent of electricity and 70 percent its total energy from burning of high sulphur coal. Coal is the main source of air pollution in Shanghai as well as most of other cities in China. The air pollution in Shanghai is sometimes terrible that air ports are shut down because of poor visibility. Nitrogen oxide is mainly released by power plants and automobiles in Shanghai. The high coal fuel consumption from urbanization and industrialization and the rapid increase of vehicles from motorization resulted in the high emission of sulphur dioxide and nitric oxide in Shanghai. The annual mean pH value of rain in Shanghai is 4.4 and the frequency of acid rain is 71 percent.
Acid rain in Shanghai with high sulphur and nitrogen contaminates all water bodies there will lead to water pollution. The high nitrogen in water increase the growth of blue green algae, will pollute whole water body will prevent using water for drinking, cleaning. Also it changes the aquatic ecosystem. Acid rain is very toxic to species in water which can reduce the fish population and could eliminate all fish species form water body and decrease biodiversity. In addition, it may cause constant stress that may not kill individual fish, but will lead to lower body weight and makes fish less...
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