I must admit I was not prepared for the outburst of personalised vituperation following my report of a climate meeting a few weeks ago. At the end of my piece, at that stage I mentioned that a professor from Princeton was coming to give a lecture. He gave it last Thursday so again, I went along to listen and hopefully to learn.

Again, what I write here is simply a report of what I heard together with some impressions I formed. In my view, there are two very distinct elements. The first, of course, is the overwhelming consensus of the world’s governments that climate change is a reality and steps must be taken to limit the increases in temperature that many maintain is inevitable if current trends continue.