An international group of leading scientists call for an urgent change in the governance of urban expansion as the world’s cities continue to grow at unprecedented rates.

The largest dam removal in U.S. history entered a critical phase this week, with the lowering of dammed reservoirs on the Klamath River.

Biodiversity data collection is growing exponentially. The increase is driven in part by international commitments to conservation, market investments and technological advances, and the growing urgency of human impacts including climate change.

Total is 20% higher than thought and may have implications for collapse of globally important north Atlantic ocean currents.

Efforts to put an economic value on nature are meant to garner support for saving it. But is that the wisest approach?