How would the world be like at 2,3,4,5 or even 6 degrees of global warming? That is the question Lynas asked himself. He answered this question in this book. In every chapter he describes the world - always one degree warmer than the last chapter. He uses different points of view from all over the world and tells different stories and different outcomes. All his ideas are backed by scientific computer models, studies and surveys. And these are provided as sources at the end of the book. The last chapters are not based on models but rather on Earth's past. What happend when Earth was this warm the last time? Based on icecores, extracted from ice millions of years old, computer models can calculate climate conditions of our planet's past. The author succedes in his mission to vividly describe the actual problem: what once happened over a time-span of millions of years (with nature being able to slowly adapt) now happens within hundrets of years, killing everything that is not fast enough to adapt (wich is almost everything - flora, fauna and of course: humans!). This is actually very interesting - and additional nightmare-fuel... Written in 2006, the book provides interesting insights - even in 2025. Some of the described scenarios already came into being. Maybe I will read this book again in 2040 to see where we stood at in 2006 (and 2025). While reading the book its hard to not become depressed. It is all death and chaos and hopelessness. The very short seventh chapter - which should provide some hope for the future does not really help. All in all, it is a pretty dim and grim climate nightmare. Not recommended before going to sleep...