Telegraph: The solution to Britain's energy problems could well be beneath our feet. On Monday, IGas, one of the leading shale gas explorers, revealed that there may be as much as 172 trillion cubic feet of shale gas in the area that it has a licence to explore in the North West of England -- equivalent to more than 50 years of UK usage. Of course, we do not know for sure if this entire amount is either there or fully exploitable, but it is a hopeful sign none the less. Cuadrilla, another energy firm, estimates...