The closure of the last deep mining pit at Kellingley Colliery  in Yorkshire, yesterday marks an end of an Era in the UK. I live in in what used to be a coal mining area  in Derbyshire, there is still plenty of coal beneath the ground, however it is uneconomic to mine, because countries such as India and China have lower production costs, probably due to lower safety standards and wages, together with state subsidies The UK government plans to…