The challenge requires an unprecedented response at the international level. But with the US relinquishing leadership, a global agreement is unlikely
The risks of climate change are greater than currently feared. A report in the December 2017 issue of the British Journal Nature presents a doomsday scenario for the planet by concluding that the rise in average global temperature by the end of the century under the “business as usual scenario" is likely to be about 5 degrees Celsius above pre-industrial levels. This is off by a huge margin from 2 degrees Celsius scenario which has been considered by the global scientific community as the upper threshold that the Earth’s environment can withstand, beyond which irreversible changes in the global climate are likely to occur.