This year’s international conference on the climate, COP27, begins on Sunday, November 6th at Sharm el-Sheikh, Egypt. The previous conference, COP26, resulted in a number of promises to reduce the production of greenhouse gases (GHGs) with the objective of limiting global warming to 1.5C above pre-industrial levels. COP27’s goal is to see how well the world has been doing so far and to plan what must happen next.

The key issues are: is global warming better or worse than it was in COP26; how fast is global warming changing and in what direction; how close are the facts to what was promised last year and what must be done to reach the 1.5C goal?

It’s time to check the evidence so far and think about alternative futures.