Shanxi Province is the famous energy and heavy chemical engineering base in our country

For many years

it is due to successively blasting operation

wantonly excavating ore and stone

discharging large amout of waste water and dregs from factories

mines and other enterprises

and destroying forest and grass cover without restraint，serious environment nuisance has been produced

such as seizing and destroying a number of land resources，worsening water quality commonly，violent soil and water loss，silting of many river beds

reservoirs and irrigation canal systems

serious environment pollution and so on. All these threaten the security of life and property of millions of inhabitants and harm the realization of four modernization. Now some factories and mines have begun to treat the waste water and discharged dregs

to utilize gangue and blast furnace water一ash multiply

Furthermore

they have adopted engineering and biological measures to conserve soil and water and have paied attention to ecological environment protection.