From The Guardian, May 4, 2007:

UN Scientists Warn Time Is Running Out to Tackle Global Warming

Governments are running out of time to address climate change and to avoid the worst effects of rising temperatures, an influential UN panel warned yesterday.

Greater energy efficiency, renewable electricity sources and new technology to dump carbon dioxide underground can all help to reduce greenhouse gas emissions, the experts said. But there could be as little as eight years left to avoid a dangerous global average rise of 2C or more. (Emphasis added.)