Area (5) Area (5) temps (durée) (3) Time (3) puits (2) littérature (2) plomb (2) environnement (2) rétombée atmosphérique (2) activité minière (2) substance chimique (2) Treatment (2) Water (2) Trace elements (2) Soils (2) Sewage (2) Nature and nurture (2) Mining engineering (2) Mines and mineral resources (2) Mineral industries (2) Literature (2) Lead (2) Euthenics (2) Ecology (2) Diaspore (2) Calcite (2) Bauxite (2) Adaptation (Biology) (2) Areas (2) zinc (1)