stated that surface mining and retort operations produce of waste water per of processed oil shale. In situ processing, according to one estimate, uses about one-tenth as much water. Environmental activists, including members of Greenpeace, have organized strong protests against the oil shale industry. In one result, Queensland Energy Resources put the proposed Stuart Oil Shale Project in Australia on hold in 2004. See also Oil shale reserves References 17th-century introductions Industry Petroleum industry Mining Energy industry Industries (economics)