It is emphasized that knowledges and experiences in economic geology are absolutely necessary for solving some environmental problems caused by the development of mineral deposits.
Soil and water pollutions by minor elements of heavy metals are usually observed in the neighborhood of metal mines. Considering the basic geochemical problems on the origin, dispersion and concentration of heavy metal elements, environmental pollutions accompanied by the development of mineral deposits are usually composed of natural and artificial pollutions.
It is very difficult to divide both these pollutions, however, making the most of knowledges and experiences in economic geology, collecting the various useful data, having a good command of high techniques, such as simulation analysis, step by step progress must be made for solution of the problems.
In addition, examples of environmental geological survey by soil and water and outlines of environmental survey with development of geothermal energy are shown, and, importance of framing background data and prosperity of underground injection of mine drainage are also mentioned.