Sky News: As the climate camp at Kingsnorth Power Station moves toward its climax, there is another battle going on at Britain’s coal face. Open cast mining is experiencing a resurgence across the country and nowhere is the protest louder than in one town in South Wales. Sky’s Environment Correspondent Catherine Jacob visited Merthyr Tydfil, home to the UK’s biggest open cast mine: Ffos-y-Fran. For decades, the green hills around Merthyr Tydfil have been free from the sights and sounds …