Deciding on Geoengineering Will Be Harder Than Doing It

A diplomatic breakdown exposes geopolitical fractures over a problematic fix for climate change

Brazilian Environment Minister Ricardo Salles looks on during a press conference at the UN Environment Assembly in Nairobi on March 14, 2019. Photo: Yasuyoshi CHIBA/AFP/Getty

One reason early humans survived what the world threw at them is that the wiser of our ancestors listened to and acted on the advice of their elders. Now former UN Secretary-General Ban Ki-moon, a member of a…