Climate Home: Coal is the single biggest threat to a stable future climate. Cheap and dirty, it is the go-to fuel for countries keen to industrialise. Cheap, that is, if you dont count the health costs of toxic air pollution or public spending on railways to transport the stuff. Major economies are primed for a triple assault on the coal gravy train in the coming week. There is an OECD bid to phase out coal export credits, a broader G20 push against fossil fuel subsidies and a climate risk disclosure drive....