World Scientists’ Warning of a Climate Emergency

William Ripple, Christopher Wolf,  Thomas Newsome, Phoebe Barnard, William Moomaw.
BioScience, Volume 70, Issue 1, January 2020, Pages 8–12,

Scientists have a moral obligation to clearly warn humanity of any catastrophic threat and to “tell it like it is.” On the basis of this obligation and the graphical indicators presented below, we declare, with more than 11,000 scientist signatories from around the world, clearly and unequivocally that planet Earth is facing a climate emergency.

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11,258 scientist signatories from 153 countries