Costing the Earth

The UN has warned that climate change is dramatically increasing the costs of basic foods over substantial areas of the globe. Awful summers have disrupted wheat production (in terms of amount and quality) in America, Russia and the UK (http://www.guardian.co.uk/environment/2012/oct/10/un-rising-food-costs-weather?INTCMP=SRCH). Then, on top of that, some grain is diverted to make biodiesel.