1. for plant,-Stench caused sweltering land air affects animals in the land.-The agent born in fig fermentation diffuser and seep into the ground, lie back in it.-Water leak out from the mud trench drains do severe pollution on the biology.-The heavy metal waste sludge from sewage seeping into the ground.-Heavy metals includes the elements: Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn. most metals except Fe the plant needs very little or do not need them. But it has the ability to accumulate in the body's biochemical systems and organisms harmful to plants, animals when eating too much heavy metal.
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