Climate change has driven some environmental activists to extremes. We talk about overcoming despair with Terry Kaelber, whose husband David Buckel took his life to protest inaction, and Tim DeChristopher, who was imprisoned for his activism. This episode was produced by Hady Mawajdeh, edited by Matt Collette, fact-checked by Laura Bullard, engineered by Paul Mounsey with help from Christian Ayala, and hosted by Noel King. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices