The message in this book is one of hope. Porritt, and many other experts believe that this decade will be crucial if we are to limit global warming to 1.5 degrees C above pre-industrial levels. Porritt argues that there is reason to be hopeful because we already have the knowledge and solutions required to address climate change in ways that could halve global emissions by 2030.
The first part of Hope in Hell summarises the science behind the state we are in, who is responsible, and what the consequences might be if we do not act now. The second part explores the knowledge and technology already available to us that we could use to mitigate these consequences. The big solution Porritt proposes is a massive ramping up of the renewables sector.
In this book Porritt authoritatively summarises our current perilous state and suggests how it must be addressed right now, through technical solutions and political activism. He says, “I’ve come to the conclusion that we have no choice: without mass civil disobedience, at this very late stage, I cannot see any other way of avoiding that threat of runaway climate change.”