Dear editor—I have just received this letter from a friend. It has serious implications for doctors and I think your readers would be interested in it.

Yours faithfully, Ian Roberts

Dear Ian—next week I am going to turn myself in. I have been on the run for years, flying in the face of reason, but it is just too exhausting. The charges against me include crimes against the planet and two counts of theft. But if I go down for this the medical profession is coming with me. They are saying I am a climate criminal and that for the past five years I have consumed unsustainably large amounts of air travel, pumping into the atmosphere tonnes of carbon dioxide that will continue to warm the planet for more than a century. In the past year I have flown to conferences in Auckland, Tokyo, Milan, and Rome. The charges are serious. According to a report by the World Health …