 They claim that the mine will contribute to acid mine drainage, climate change and the possible extinction of a species of "Powelliphanta" snail.On 27 May 2007, "The Sunday Star-Times" reported that Thompson and Clark Investigations Ltd, a security firm employed by Solid Energy, used private individuals to spy on SHVC.A second spying episode was alleged involving Thompson and Clark attempting to employ another spy to obtain information from SHVC.