Climate change is, perhaps, the biggest challenge to ever face us. It is here now, manifesting itself in changing sea levels, warming temperatures and shrinking ice, changing weather, increasing numbers and severity of extreme events, the arrival of new pests and diseases, and on and on. The world is rapidly becoming a different place than the one you and I grew up in. For our children, grandchildren, and posterity we need to manage our world in such a way as to meet this challenge. Time is running out. The science of climate is an exact science, based on observations and factual deductions...