With the expanding of economy, the environment protection has become more and more critical especially in developing countries. China is the 2 nd economic entity in the world and faces even more challenge. Heavy metals are naturally found in soils and rock formations but may also occur in fertilizers and pesticides, as a result of which may cause heavy-metal contamination. The global rate of heavy metal pollution is rapidly increasing in various habitats, heavy metals such as Cadmium (Cd) are one of the most fundamental causes of soil and water pollution in industrialized and developing countries. Metal pollution is a serious environmental problem worldwide, and severely threatens biological diversity and human health. Cadmium (Cd) is a heavy metal that accumulates in the environment and causes pollution as well as intoxication of both vertebrates and invertebrates. Cd biomagnification in the terrestrial food chain appears to be dependent on the physiological properties of the organisms rather than on their trophic level. Although high Cd body burdens in spiders from the field have been reported many times, experimental verification of the key factors that determine the rate of cadmium accumulation is lacking. Metals can accumulate in plants, and via food webs can cause harmful effects to herbivorous and
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