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Panorama of Berkeley Pit, acid lake formed from water filling defunct... News PhotoAcid,Color Image,Copper,Copper Mine,Economy,Environment,Environmental Damage,Environmental Issues,Filling,Horizontal,Lake,Mine,Mining,Risk,Shape,TIMEINCNOTOWN,Threats,USA,WaterPhotographer Collection: The LIFE Images Collection William F. CampbellPanorama of Berkeley Pit, acid lake formed from water filling defunct strip mine reacting w. acidic mining residues from copper are posing environment threat to community. (Photo by William F. Campbell/The LIFE Images Collection/Getty Images)