Sir, – I hope you will forgive this vanity in following up my own article (NR108/2). Much has happened since. Ill-educated, shouty Greta Thunberg has seen her dream come true; an industrial catastrophe, with millions thrown out of work and a sharp fall in emitted CO2. Has this affected atmospheric levels? Not a whit. Mauna Loa continues its rise as if nothing had happened. Now at 412ppm, it has risen 11ppm in the five years since the vaunted Paris Agreement. Proof of the ineffectiveness of de- carbonisation? We clearly don’t understand the global carbon cycle. COP26 at Glasgow is cancelled, de…