Yale Environment 360

Global warming is a problem, says climate scientist Jonathan Foley, but it's not the only one. The other major problem facing the global environment is a pattern of land use for agriculture that is grossly unsustainable.

A new report in the journal Nature suggests that there are seven thresholds for determining planetary health -- and we're already past three of them.

The ambitious green Chinese city of Dongtan was hyped up to be one of the most environmentally friendly cities in the world. But now, like other eco-city plans, work on the project has slowed to a halt.