Then, by using climate models to project future temperatures, the researchers were able to estimate economic
growth over the rest of the century if these historical patterns hold true.
Massive movements of people are likely to
occur over the rest of the century because global temperatures are likely to rise to by up to 5C because carbon dioxide levels have risen unabated for 50 years, Stern, who is head of the Grantham Research Institute on Climate Change, said.
Over the rest of the century, global investments in energy and energy infrastructure will total many trillions of dollars.