Humanity Crosses 4 of 9 ‘Planetary Boundaries,’ Q&A with Steve Carpenter
The journal Science published an article online today that says civilization has crossed four of nine “planetary boundaries” due to human activity. According to an international team of 18 researchers, 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 …