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Aug 19, 2016

Earth: 6 Human Activities That Pose The Biggest Threat To The World’s Drinking Water |ThinkProgress

source: PNAS.org article
Click for post at ThinkProgress. It summarizes effects on watersheds of such things as factory farming, coal ash, sewage, and other big but solvable problems worldwide as described in a recent study by the National Academy of Sciences of the USA:
6 Human Activities That Pose The Biggest Threat To The World’s Drinking Water — ThinkProgress