Jonny’s journey begins at the Belchatow open cast mine in Poland, where he is awestruck by the breathtaking scale of one of the world’s biggest coal excavators. It is here that lignite, a form of coal, is excavated to create power for up to 20% of the country. The mine is an amazing 12 kilometres by 3 kilometres deep and is linked to the power station by a staggering one hundred kilometres of conveyor belts.