"This is a five-alarm fire for humanity," the group Climate Defiance tweeted in response to the figures.
Allowing warming to breach that point increases several climate risks, according to the Intergovernmental Panel on Climate Change (IPCC): 2°C of warming compared with 1.5°C would raise sea levels by an additional 0.1 meters by 2100, destroy 99% of coral reefs instead of 70% to 90%, and expose several hundred million more people to poverty and climate-related hazards by 2050.
Friday's 2°C breach was first noted by Copernicus Climate Change Service deputy director Samantha Burgess on social media Sunday. She said the day was also 1.17°C above the 1991-2020 average, making it the warmest November 17 on record.
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