Climate change is the greatest single problem we face as a planet. This introduction skillfully guides us through the complex mix of scientific, political, social, and environmental issues to explore the possible futures for our world. Focusing on the fact that the point of no return may have already been passed, Boyd and Tompkins highlight the urgent need to start address Climate change is the greatest single problem we face as a planet. This introduction skillfully guides us through the complex mix of scientific, political, social, and environmental issues to explore the possible futures for our world. Focusing on the fact that the point of no return may have already been passed, Boyd and Tompkins highlight the urgent need to start addressing the wide-ranging consequences of our changing climate if we want to avoid catastrophe.