Why copper green coating is form during rainy season?
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https://www.meritnation.com/ask-answer/question/name-and-give-the-chemical-formula-of-the-green-coating-c/chemical-reactions-and-equations/10406989
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https://www.meritnation.com/ask-answer/question/name-and-give-the-chemical-formula-of-the-green-coating-c/chemical-reactions-and-equations/10406989
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