how are coal formed and what is coak and coal tar and how are petroleum formed explain this by the book of Sk jain and shailash k jain and please explane it by only this book so that i can understand and don't ignore because if you are really good person then you can use and explain each line
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coal formed by dead plant coak and coal tar is substance made by coke petroleum formed by dead water animal whixh take million year
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