Climate scientist James Hansen attends a 2017 press conference at COP23 in Bonn, Germany. Sean Gallup/AFP via Getty ImagesOne of the world’s top climate scientists is back with more dire warnings about global warming.Climate change is accelerating, he says. And the planet may be far more sensitive to greenhouse gases than scientists previously estimated. The Paris Agreement’s 1.5 Celsius target already has been breached — and even the 2 C target may be out of reach.On top of all that, a cascading series of global tipping points, from collapsing ice sheets to catastrophic sea-level rise, may already be imminent.Those are the latest alerts in a new paper led by James Hansen, director of Columbia University’s Climate Science, Awareness and Solutions Program and a former director of NASA’s Goddard Institute for Space Studies — a man who has spent the last four decades clanging alarm bells over the planet’s rising temperatures.GET FULL ACCESS
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