... but the last estimate I saw put it at ten to twenty years, and probably the short side of that ... so around 2020-2025 might not be a bad guess.

And expansion of coal supply will be increasingly difficult as they approach the plateau ... which the Chinese government seems likely to ascribe to "successful efforts to cope with CO2 emissions".

I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.