the sixth such report from the IPCC since 1988, has been eight years in the making, marshalling the work of hundreds of experts and peer-review studies.
It represents the world’s full knowledge to date of the physical basis of climate change
found that human activity was “unequivocally” the cause of rapid changes to the climate, including sea level rises, melting polar ice and glaciers, heatwaves, floods and droughts.
Global temperatures were likely to top 1.5C above pre-industrial levels in the next two decades
The gravity of the situation laid out in the report blows away blustering over the supposed costs of climate action. In any case, not acting will cost far more.
Human activity is changing the Earth’s climate in ways “unprecedented” in thousands or hundreds of thousands of years, with some of the changes now inevitable and “irreversible”, climate scientists have warned.
Within the next two decades, temperatures are likely to rise by more than 1.5C above pre-industrial levels, breaching the ambition of the 2015 Paris climate agreement, and bringing widespread devastation and extreme weather.