The likelihood of an Arctic Ocean free of sea ice in summer would be once per century with global warming of 1.5 degrees Celsius, compared with at least once per decade with 2 degrees Celsius. Coral reefs may survive with 10-30% probability in the 1.5 degrees Celsius case while being virtually eliminated in the other scenario”. Global warming is likely to reach 1.5°C between 2030 and 2052, if it continues to increase at the current rate. All pathways that limit global warming to that level—with no overshoot—project the use of carbon dioxide removal (CDR) on the order of 100-1,000 GtCO2 over the 21st century. Nordhaus was among the early environmental economists to warn about the costs of climate change, and Romer has worked extensively on the endogenous growth theory.

Source: Mint October 14, 2018 15:56 UTC