Thursday, 3 November 2016

                                                                            acid rain
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Acid rain is a rain or any other form of precipitation that is unusually acid, meaning that it possesses elevated levels of hydrogen ions (low ph). It can have harmful effects on plants, aquatic animals and infrastructure. Acid rain is caused by emissions of surfer dioxide and nitrogen oxide, which react with the water  in atmosphere to produce acids.Nitrogen oxides can also be produced naturally by lightning strikes, and sulphur dioxide is produced by volcanic eruptions. The chemicals in acid rain can cause paint to peel, corrosion of steel structures such as bridges, and weathering of stone buildings and statues.