A 3,600-square-foot rooftop garden caps this office space retrofit by Cook+Fox Architects

The indelible link between climate change and social unrest in the Arab world

How eating consciously can affect global warming

Conflict over resources could cause global instability, says U.N. official

Scientists say state's water future is "bleak."

Strawberry and thyme among drought-tolerant plants approved for city's residential parkways.

Global forest loss slowed over the past decade, with less logging in the Amazon and widespread tree planting in China.

Is the Pentagon’s Haiti mission a model for a new security role?

U2 singer hums the polluter-pays tune in New York Times op-ed piece.