When Will We Reach 1.5 C of Warming? And How Will Climate Scientists Know?

image via New Scientist

March 20, 2025, 5:30 PM

• •Nearly 200 nations committed back in 2015 to pursuing efforts to keep global temperatures from exceeding 1.5 degrees Celsius above preindustrial levels.
• •The world can't seem to agree on when the planet will exceed a key temperature threshold in the Paris climate agreement.
• •The expert group is still working to come up with a single way to monitor current warming, said Chris Hewitt, director of the climate services branch of the WMO.

Scientists are racing to establish a single way to monitor current warming, as the world gets closer to the mark 1.5 degrees Celsius in Paris climate agreement. The world can't seem to agree on when the planet will exceed a key temperature threshold in the Paris climate agreement. Nearly 200 nations committed back in 2015 to pursuing efforts to keep global temperatures from exceeding 1.5 degrees Celsius above preindustrial levels. But there is no official metric for determining when the world has crossed that line into increasingly catastrophic impacts.

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