Bloomberg: The cost of containing rising temperatures to safe levels may reach 4 percent of economic output by 2030, according to a draft United Nations report designed to influence talks for a global-warming treaty.
Most scenarios that meet the 2-degree Celsius (3.6-degree Fahrenheit) cap on global warming that world leaders endorse require a 40 percent to 70 percent reduction in heat-trapping gases by 2050 from 2010 levels, according to the third installment of the UNs biggest-ever study of climate change....