The Paris climate agreement goal of limiting global warming to 1.5 to 2 degrees Celsius (ºC) is well above temperatures experienced during the Holocene — period of human settlement over the last 11,700 years — and is far from safe because “if such temperature levels are allowed to long exist they will spur “slow” amplifying feedbacks… which have potential to run out of humanity’s control.”
That’s the message from some of the world best climate scientists, including former NASA climate chief, James Hansen, in a newly paper, “Young people’s burden: requirement of negative CO2 emissions”, published in Earth System Dynamics this month.
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