Guardian: The UK's fracking pioneer Cuadrilla was prevented by the Environment Agency from using a hazardous chemical at its drilling site in Sussex, local residents have been told. But permission was granted for another chemical despite concerns over its safety. Chris Wick, of the Environment Agency, told a packed meeting of residents in Balcombe's church on Wednesday night that "we stopped Cuadrilla using one or two things". The chemical that was banned was antimony trioxide. The Environment Agency told...