For every 0.55ÂºC temp rise, US to lose 0.7% GDP: Study 
Researchers examining the economic consequences of climate change in the USA have found that for every 0.55ÂºC global temperature rise, the US economy stands to lose 0.7% of its GDP. Further, poorest third of the US counties could lose 20% of their incomes and annual mortality rates would rise by five deaths per 1,00,000 per degree rise in the temperature.