Hydraulic fracturing—also known as fracking—has become increasingly controversial in the United States over the past several years, especially in states such as Michigan with large shale gas deposits that were previously unextractable. In 2012, a Michigan fracking ban initiative failed to make it onto the November statewide ballot, but citizens groups are presently collecting signatures in an attempt to get the initiative onto the November 2014 ballot as an “initiated state statute.” And, more recently, state auctions of drilling permits have been the scenes of citizen protests driven by concerns about the potential environmental impacts of hydraulic fracturing.
Garavaglia, Barbara H. "Hydraulic Fracturing: Sources of Law and Information." Mich. B. J. 92, no. 9 (2013): 58-9.