World Bank looks at 4 degrees C

A Report for the World Bank by the Potsdam Institute for Climate Impact Research and Climate Analytics 11/2012

 

"This report spells out what the world would be like if it warmed by 4 degrees Celsius, which is what

 scientists are nearly unanimously predicting by the end of the century, without serious policy changes."

 

http://climatechange.worldbank.org/sites/default/files/Turn_Down_the_heat_Why_a_4_degree_centrigrade_warmer_world_must_be_avoided.pdf