Alarming report on the self-destructive consequences of unchecked global warming. "Every tenth of a degree is worth fighting for," believes Germany's most important climate researcher with an international reputation. For decades, he has argued that politics, business, and society must finally confront climate change and its dramatic consequences and do everything possible to stop it. In a provocative thesis book, he sharpens his criticism once again: Based on current knowledge, our civilization is not moving towards the often-cited two-degree limit, but much more dramatically towards a warming of 3 to 4 degrees Celsius by the end of the century. The continued burning of fossil fuels threatens to lead to collective suicide. Hans Joachim Schellnhuber summarizes the current knowledge with utmost clarity so that politicians can act in a timely manner.