Hannah Ritchie, a data scientist at the University of Oxford, offers encouraging answers to climate questions in her book "Clearing the Air." She believes the world is decarbonizing faster than most realize, with the real bottleneck being belief in progress. Ritchie discusses the dueling climate narratives of denial vs. despair, individual choices vs. systemic change, and shifting politics of clean energy. She highlights objective trends like the collapse in costs of solar, wind, and batteries, and the increasing deployment of clean technologies. Ritchie's views on climate change shifted from doom to optimism as she observed long-term data and technological advancements. The section emphasizes the importance of making choices now that will benefit future generations in terms of climate change, stressing the need to use current resources and tools to create a safer, cleaner, and fairer world for future generations. The author sees the optimistic story of climate solutions as an opportunity that requires action and effort to become a reality.