“Last December we had temperatures of 25C. Normally it is 1 or 2C at that time of year,” says Mohammed Ibrahimi, a farmer with one hectare of apple trees in Boumia, a village near Midelt in Morocco. “These trees need at least 1,200 hours of near-freezing temperatures in the winter to help them to regenerate. This year they flowered very late; the harvest was a month late and I harvested just 20 tonnes when I’d…