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UN report: Effects of climate change even more severe than we thought

Global warming is happening so fast that scientists now say we'll cross a crucial temperature thresholdas early as 2030 — up to a decade sooner than previously thought — according to a sweeping new U.N.-sponsored review of climate science published Monday.

The big picture: Atmospheric CO2 concentrations were higher in 2019 than at any time in at least 2 million years, and the past 50 years saw the fastest temperature increases in at least 2,000 years, according to the new assessment by the Intergovernmental Panel on Climate Change (IPCC).

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