In a world transformed by rising temperatures, extreme weather, and ecological uncertainty, A New Genre for a Warming Planet: Green or Dark Cli-Fi invites readers to explore the stories that help us imagine our shared future. Climate Fiction, or Cli-Fi, is more than a genre—it is a laboratory for ethical reflection, emotional engagement, and ecological awareness. Through narratives of hope and peril, regeneration and collapse, readers navigate the moral, social, and environmental challenges of a warming planet. This book examines the spectrum of Green optimism and Dark caution, showing how imaginative storytelling trains the mind to anticipate consequences, understand interdependence, and cultivate resilience. For anyone who wants to engage deeply with the future of humanity and the planet, this work illuminates how fiction can become a powerful tool for insight, foresight, and meaningful action.