The BBC’s relentless efforts to promote the need for that treaty to “decarbonise” the world’s economies they so desperately want to see agreed in December are getting way beyond a joke. On Monday’s Today programme, for instance, they yet again wheeled on that joke figure Lord Stern to tell us that renewable energy now enjoys “very little subsidy or none at all” (don’t tell the owners of offshore wind farms, who imagine they are getting subsidies of more than 200 per cent). Most energy from fossil fuels, Stern went on, is “heavily subsidised”, to the tune of “$500 billion a year”. Even John Humphrys sounded faintly disbelieving when Stern explained that most of this “subsidy” was the taxation not imposed on fossil-fuel companies for “polluting” the planet.