Common sense from an uncommon group of thinkers. The people at The Economist are pretty sharp, and they say in a recent opinion piece about climate change that

Plenty of uncertainty remains; but that argues for, not against, action. If it were known that global warming would be limited to 2°C, the world might decide to live with that. But the range of possible outcomes is huge, with catastrophe one possibility, and the costs of averting climate change are comparatively small. Just as a householder pays a small premium to protect himself against disaster, the world should do the same.