Nature said in an editorial the proposed indicators were a "creditable attempt" to quantify limits on human use of the planet. However, it noted, for instance, that fertilizers caused pollution yet helped feed millions of people.

Hans Joachim Schellnhuber, head of the Potsdam Institute for Climate Impact Research and a co-author of the study, said there were growing risks of abrupt and possibly irreversible changes.

"Since the Industrial Revolution, a new era has arisen, the Anthropocene, in which human actions have become the main driver of global environmental change," they wrote.

If you see Al Gore, strangle him before he can spy on you. He’s a traitor who has sided with the earth.

what a smart alec.

This makes me think of The Hitchhiker's Guide to the Galaxy.

love that show!