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The Historyscoper's Science and Technology Watch Blog Apr. 2, 2015

Saturday, January 17, 2015

Scientists: Human activity has pushed Earth beyond four of nine ‘planetary boundaries’

http://www.washingtonpost.com/national/health-science/scientists-human-activity-has-pushed-earth-beyond-four-of-nine-planetary-boundaries/2015/01/15/f52b61b6-9b5e-11e4-a7ee-526210d665b4_story.html
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