Climate scientists (Meinhausen et al 2009) have calculated that if 886 Gt CO2 is released globally during the period 2000 – 2050, there is a 20% chance global warming will exceed 2°C. In 2011, we have already burnt over one third of this 886 Gt CO2 budget, and the known fossil fuel reserves easily exceed the remaining allowance. The reserves beyond this limit are what we refer to as unburnable carbon.

The programme will follow the unburnable carbon trail through the relationships outlined below:

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