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UN Report Puts 70% Odds on Earth Crossing the 1.5°C Climate Threshold by 2029, and Scientists Say the Probability Is Still Rising
For years, 1.5 degrees Celsius functioned as something between a scientific target and a moral line. World leaders agreed to it in Paris in 2015. Climate researchers cited it in warnings. Activists carried it on signs. It was the number that separated manageable disruption from something harder to contain, and for a decade, the scientific…