The growing threat of climate change is no longer a matter of contentious scientific debate. Climate scientists now agree that humanity’s “carbon budget”—the cumulative sum of greenhouse gases that humanity can emit while avoiding the worst effects of climate change—will be exhausted by roughly 2040 at current emission rates. While all levels of warming carry consequences, exceeding this budget will likely cause more than 2 degrees Celsius of warming, triggering irreversible,…

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Read more stories by Scott P. Burger, Liqian Ma, Fiona Murray & Sarah Kearney.