Graph kindly borrowed from The Economist article this week: The only good news about the Earth's record greenhouse gas levels is that they have been well measured.
Hurricane Sandy: 72 American deaths and 1.2% of GDP of the affected states.
Bangkok flooding: World surge in rice prices and economic growth slashed.
Freezing winters: deaths across Europe and economic growth harmed.
Ocean acidification (it absorbs your carbon): No more fish n'chips.