At last, industrialists are speaking out about the difficulties of going green.

You know all that guff about speaking truth to power, an expression which has become so hackneyed as to render it almost meaningless? Well, here is a rare example of when that description fits the bill. The boss of the world’s biggest car company has warned the world that battery-operated electric vehicles (BEVs) will only make up three out of ten of all cars driven on our roads for decades to come.