Runaway Climate Change
The International Panel on Climate Change forthcoming report, Climate Change 2007, confirms what we already knew: that human activity has caused, and is causing, the climate to change.
But as this video from the Apollo Gaia Project outlines, what gets left in IPCC reports is not the whole story. Positive feedback (such as dark pools of water in melting ice speeding up the melting) mechanisms are often down-played.