How has the climate changed in the past? How is it changing now? How do we know? And what kind of a future do we want to create? A concise and authoritative explanation of climate change This is a short book that does one thing: it is a clear and concise explanation of climate change - how it's happened, our part in it, what we are currently doing about it and what we need to do about it. Why, you might ask, do we need another book on climate change? The answer is that in December this year, in Paris, is the most important climate change conference there has ever been. It is make-or-break time, and we need to be in full possession of the facts. We need to decide what kind of world we want to leave our grandchildren.