In this urgent authoritative book Bill Gates sets out a wideranging practical and accessible plan for how the world can get to zero greenhouse gas emissions in time to avoid a climate catastrophe.Bill Gates has spent a decade investigating the causes and effects of climate change. With the help of experts in the fields of physics chemistry biology engineering political science and finance he has focused on what must be done in order to stop the planets slide toward certain environmental disaster. In this book he not only explains why we need to work toward netzero emissions of greenhouse gases but also details what we need to do to achieve this profoundly important goal.He gives us a cleareyed description of the challenges we face.