Elizabeth Kolbert, author of The Sixth Extinction, examines humanity's attempts to fix environmental problems we created by creating new environmental interventions—and asks whether this recursive strategy can possibly work. She visits facilities breeding endangered fish species in artificial rivers, operations attempting to turn captured carbon dioxide into stone, and researchers engineering heat-tolerant coral for oceans too warm for natural reefs. The book's title comes from the moment when scientists planned to release genetically modified organisms that could make the sky white with sulfur particles to reflect solar radiation—intervening in the atmosphere under a white sky to address our intervention in the climate. Kolbert's approach is observational rather than polemical; she meets the scientists doing this work, understands their reasoning, and conveys the strangeness of their projects without dismissing them. Her subjects include efforts to gene-drive invasive species out of existence, to create artificial marshes that might absorb floodwaters, to bioengineering organisms that might survive conditions natural evolution never anticipated. The book raises questions about hubris, unintended consequences, and whether there's any alternative to technological intervention in a world already thoroughly transformed by technology. Kolbert writes with the precision and dry humor that characterized her earlier work, turning technical subjects into compelling narrative. Readers will encounter the cutting edge of conservation biology and climate intervention while confronting the philosophical puzzle of what 'nature' means when nothing remains unaffected by human action.