I suspect this is not the most closely watched contest, but my nomination for graph of the year has to be this one showing the transformation of the US electricity grid in recent years.
This rather significant shift from coal to gas is one of the reasons behind America reducing its carbon emissions more than any OECD country between 2006 and 2011. It may be difficult for some to acknowledge it, but it is now important to recognise that the US shale gas revolution has opened up the possibility for quick and easy cuts to US emissions. Gas plant capacity factors remain significantly lower than for coal plants. This opens up the possibility of pain free cuts in electricity emissions for the rest of the decade, simply by increasing the electricity from existing gas plants while reducing that from coal plants.
Instead of calling for bans on fracking, a more nuanced position is necessary. One which tries to minimise the environmental risks from fracking while hastening the switch from coal to gas.