Commonly,more than eighty percent of times people spend are in rooms,and concentrations of many pollutants in room are higher than outside.The indoor air pollutants,pollution sources,harms on human body and some measures to control indoor pollution are introduced.

The pollution of heavy metal is one kind of accumulated chronic pollution with hidden,irreversible and long time characteristics,and it can lead animals to mutation,deformity and cancer.Therefore,the environmental pollution of heavy metal is indisputable,its prevention should be strengthened to control pollution incident.

Located in the west Inner Mongolia, the potential factors of desertification in Ba Yan Nor city are existed extensively. The land exploitations over many years have made the deserted land bigger and bigger and caused the ecological environment seriously damaged. To curb desertification and recover ecological balance gradually is an important task to realize sustainable development of local level.

The Pb poisoning can impact both one self and family members even next generation,the embryo touched by Pb could lead to death or deformation.If one of parents touches Pb,their kids always act torpidly and disorderly and die easily.Pb is the prominent threat to child and it has become one of serious environmental problems.

According to reliant data and chemical theory, the new method and new thinking of industrial chromium residue and chromium-contained wastewater treatment are put forward and applied into practice.