b'EpilogueOr, A Prologue We choose to bring money back down to earthnot because it is hard, but because it is easy. No, JFK never said that. What he said was, We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard. We need a similarly inspired effort today, but with a new call to action, of which this is an exemplar: For more than 30 years, the science has been crystal clear. How dare you continue to look away and come here saying that youre doing enough?. . .How dare you pretend that this can be solved with just business as usual and some technical solutions? With todays emissions levels, that remaining CO 2budget will be entirely gone within less than 8 years. . 1That was Greta Thunberg at the U.N. in 2019.1 Address at the U.N. Climate Action Summit, September 23, 2019. To have a 67% chance of staying below a 1.5 degrees global temperature risethe best odds given by the Intergovernmental Panel on Climate Changethe world had 420 gigatons of CO 2left to emit back on January 1, 2018. Today that figure is already down to less than 350 gigatons. 5'