Yesterday I learnt how much water there is on earth, because it was one of our water of life questions. On earth, if there was only one litre of water, the only water we'd be able to drink is about a drop. That's a one three thousandths of 1000! The other water is either to far under ground, salt water or is frozen. Or in the pipes and sewers. Think about only one litre of water on earth! How would you cope?
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