Peabody煤炭公司处治所属矿山酸性排出水的计划,由于经营地点遍及十个州而非常复杂。其复杂的原因是,煤层、复盖岩层及地形在不同的地区有着很大差异。这里,只限于讨论美国中西部或地形较起伏的矿区。鉴于一个地区消除有关污染的办法,对于另一地区可能就不适用, Peabody Coal’s plan to treat the acidic effluent from its mines is very complicated by the ten locations it operates in. The reason for this complexity is that the coal seam, overburden rock formation and the topography vary greatly in different regions. This is for discussion only in the Midwestern United States or more undulating mined areas. In view of the fact that the elimination of pollution-related measures in one area may not apply to another,