Suggested Mapping Words uranium environment waste spills mining milling northern Saskatchewan radiation jobs money exploration nuclear accidents Three Mile Island Chernobyl tailings management area rock water ecological damage overburden machinery drinking water ground water contamination lakes water table rivers industry government regulations occupational health and safety branch Saskatchewan Energy and Mines Saskatchewan environment Cluff Lake Rabbit Lake Cigar Lake Uranium City Key Lake land use radon gas clean-up plans air pollution transportation disruption of food chain trucks employment water quality research education reporting public responsibility problems solutions decommissioning safety precautions community