Nature World: It's time to ditch the climate goal of limiting global warming to 2 degrees Celsius (3.6 degrees Fahrenheit), a pair of Californian scientists argued in an essay released this week. It's an opinion that's likely to spark a lot of heated debate in the climate science community.
This theoretical line in the sand was drawn in 2009 at the United Nations (UN) Climate Change Conference, aimed to keep warming above pre-industrial levels. And even though the 2 degrees limit is somewhat arbitrary, it's...