Point of no return Due to the human-made climate crisis, the earth is warming up dramatically. In the near future, points will be reached that will have irreversible consequences. Exactly where this point is located is not known and can only be determined with extreme difficulty, because a large number of global processes must be included for the determination. There are opinions in the scientific community that consider the point of no return in global warming to have already been passed. By Lutz P. Kayser