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Planetary Boundaries

Can Humans Really Break The Planet?

Tom Zeller Jr. | Posted 05.02.2013 | Green
Tom Zeller Jr.

Dire warnings that our localized environmental impacts could trigger global-scale "tipping points" and permanently break the planet have no scientific basis, authors of a new paper argue. Not everyone agrees.

What Will It Take to Slow the World's 'Unsustainable Path'?

Robert Walker | Posted 08.08.2012 | Green
Robert Walker

When it comes to climate change and other environment challenges, Mitt Romney can plead ignorance, even if it's feigned. But what about President Obama?