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| − | '''Acid rain''' is [[rain]] that is more [[acid]]ic than in its natural state, and is usually consider to be a pH of less than 5. (Natural rain water is slightly acidic due to the presence of dissolved [[carbon dioxide]]. Acid rain forms when [[sulfur dioxide]] dissolves in [[water]] to make [[sulfurous acid]]. The [[sulfur dioxide]] can also be oxidized to [[sulfur trioxide]] and form [[sulfuric acid]] upon reaction with [[water]]
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| − | Acid rain can cause damage to structures and statues, and also plant life. (For example the [[Black forest]] of [[Germany]] has been heavily damaged by acid rain.)
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| − | [[category:environment]]
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| − | [[Category:Chemistry]]
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