After her Pulitzer-winning The Sixth Extinction, Elizabeth Kolbert’s new book, Under a White Sky, describes the world of “techno-fixes” to the damage we have inflicted on nature. Today, the world faces the dilemma that even the most well-intentioned interventions risk making matters worse, though we may no longer have the luxury of refusing them. In a century that will be shaped by the climate crisis, learning to navigate humanity’s “mixture of hubris and cluelessness” when dealing with nature will be essential.