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

This article is from the source 'washpo' and was first published or seen on January 15, 2015 19:36 (UTC). It last changed over 40 days ago and won't be checked again for changes.

You can find the current article at its original source at 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?wprss=rss_homepage

The article has changed 1 times. There is an RSS feed of changes available.