An international team of researchers says climate change, the loss of biosphere integrity, land-system change, and altered biogeochemical cycles like phosphorus and nitrogen runoff have all passed beyond levels that put humanity in a “safe operating space.” Civilization has crossed four of nine so-called planetary boundaries as the result of human activity, according to a report published today in Science by the 18-member research team. Among them is Steve Carpenter, director of the University of Wisconsin-Madison Center for Limnology and the only U.S.-based researcher on the study.
Read the full article at: http://news.wisc.edu/humanity-has-exceeded-4-of-9-planetary-boundaries-according-to-researchers/