My friend John Bevan sent me a link to this video by Greg Craven, and asked me to comment on it, so here you go.
In the video, which has been around for several years and has several million views (by which I mean to point out that this contribution is superfluous), Craven gives his analysis of the climate change debate. Using a simple logical tool, he seems to cut straight through all the controversy over whether and to what extent climate change is man-made and preventable, to an incontrovertible conclusion about what we must do: act now to prevent it.