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There is no more fundamental substance to life on earth than water. Ninety nine percent of all human molecules are water molecules. Three quarter of the earth's surface is covered by either saltwater or freshwater, yet millions face a daily struggle to access enough water for su…
There is no more fundamental substance to life on earth than water. Ninety nine percent of all human molecules are water molecules. Three quarter of the earth's surface is covered by either saltwater or freshwater, yet millions face a daily struggle to access enough water for su…