Coal and coal mine drainage.
D000143:Acids; D003032:Coal Mining; D004463:Ecology; D004777:Environment; D055593:Geological Phenomena; D005844:Geology; D007220:Industrial Waste; D008722:Methods; D012037:Refuse Disposal; D014876:Water Pollution / Q000032:analysis*
D000143:Acids; D007220:Industrial Waste