Studies of critical concentration distribution features of polluted elements of Cd and As in main soil types of China, such as laterite, crimson soil, purplish soil, yellow brown soil, brunisolic soil
One of the major characteristics about the water resources and water pollution in China is that the southem part of the country is endowed with abundant water resources with serious water pollution oc
Studies of the law and characteristics of population and land-use development of the Bejing-Tianjin-Tangshen region from 1153-1949 indicated that the land development process in the region is closely