The scientific view that the increase in global temperature should be below two degrees Celsius to avoid climate calamity.
Scientists estimate that humans can pour roughly 565 more gigatons of carbon dioxide into the atmosphere by midcentury and still have some reasonable hope of staying below two degrees.
The amount of carbon already contained in the proven coal and oil and gas reserves (still underground and untapped) of the fossil-fuel companies
The amount this is worth to oil and gas companies
The remaining reserves which will have to remain in the ground to keep temperature rises to two degrees or less.
350.org founder and writer Bill McKibben will be in NZ in June for his “Do The Maths” tour. Visit maths.350.org/nz for more information