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acid rain

             Acid Rain is a serious problem with disastrous effects. Many believe that this issue is too small to deal with, but if the acid rain problem is not met with head on, the effects on people, plants, animals, and the economy will only worsen. In the following paragraphs you will learn what acid rain is, the effects it has on human life, animals, the economy, the economic costs, and what is being done to help to stop this problem. This topic is very important because acid rain effects everyone everywhere all over the world.I. What is acid rain?Acid rain is the combination of two chemicals released into the atmosphere. These chemicals are sulphur dioxide (SO2) and nitrogen oxides (Nox). Natural sources such as volcanoes, sea spray, rotting vegetation and plankton are all contributors to acid rain, but burning fossil fuels, such as coal and oil which are referred to as dry emissions are largely to blame for more than half of the emissions into the world.2 Nationally, one hundred and twenty tons of sulfur dioxide and nitrogen dioxide are emitted into the air each day.4A. How is acid rain formed?When the sulfur dioxide reaches the atmosphere, it oxidizes to first form a sulfate ion. It then becomes sulfuric acid when it joins with hydrogen atoms in the air and falls back down to earth, usually in the form of rain, snow, or fog.1 Oxidation occurs the most in clouds and heavily polluted air where other compounds such as ammonia and ozone help to catalyze the reaction, converting more sulphur dioxide to sulphuric acid. The following are the stoichiometric equations for the formation of sulphuric acid:S (in coal) + O2 SO22 SO2 + O2 2 SO3SO3 + H2O H2SO4Nitric oxide and nitric dioxide are also components of acid rain. Its sources are mainly from power stations and exhaust fumes. Like sulphur dioxide, these nitrogen dioxides also rise into the air and are oxidized in the clouds to form nitric acid.

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