"What do we do when the climate warming boundaries set by the Paris Agreement have been passed? In the overshoot era, schemes proliferate for muscular adaptation or for new technologies to turn the heat down at a later date by removing carbon from the air or by blocking sunlight. Such technologies are by no means safe; they come with immense risks and provide an excuse for those who would rather avoid limiting emissions in the present. But do they also hold out some potential? Can the catastrophe be reversed, masked or simply adapted to once it is a fact? Or will any such roundabout measures simply make things worse?"-- Provided by publisher.