We spend the hour with IPCC cli­mate sci­en­tist Joëlle Ger­gis, talk­ing about her pow­er­ful and mov­ing book, Humanity’s Moment: A Cli­mate Scientist’s Case for Hope.

It’s about how she grap­ples with the grief her sci­en­tif­ic find­ings con­front her with — but also the hope she feels as she wit­ness­es how the tide is turn­ing toward cli­mate protection.