The problem with books by environmentalists is that they tend to be very bleak. But this one, fortunately, devotes substantial space to the solutions. Jonathon Porritt is a well-known environmentalist, author, and thought-leader. His facts are put together to strike fear and energise action. With apologies to the author, let me try and summarise his arguments in a paragraph.
Human activity has been causing a massive increase in greenhouse gases (primarily CO2) for a while now and the earth’s average temperatures have been rising. The amount of CO2 in the atmosphere today was last observed somewhere between 3 to 5

)