Guardian: It is one of the biggest, most polarising issues there is, but artists who have created an indoor fracking installation insist they are not trying to sway opinion either way. "We want to create an emotionally engaging experience. People can then go away and come to their own conclusions," said Heiko Hansen, who with his partner, Helen Evans, has recreated the sounds, tremors and flames you would get from a fracking operation. The process of fracking or hydraulic fracturing involves drilling...