• Industrial wastes: Many industrial countries around the world discharge pollutants that are toxic and very harmful to the environment. Industries discharge much chemical waste directly into natural bodies of water. The toxicity of the toxic waste is very different. Contains dangerous to humans as the flammable substance has a low flash point, the insecticides, the chlorinated materials decompose slowly, have smaller physical impact but its volume is big problem the mine tailings, slag, gypsum old phosphate or other hydroxide paste.• Sewage: Operational processes and production activities of man in the urban areas, industrial zones and craft villages cottage industry has arisen out of the solid waste and liquid under different. Wastewater is discharged into the environment after the process used in human activities. Water is a mixture of water or liquids containing waste from households, schools, shopping centers or industrial with underground water sources, rainwater.• Agricultural chemicals and wastes: The livestock activities: fertilizer, animal urine, food scraps untreated put into environmental and agricultural activities other pesticides, fertilizer from rice paddies, coconut, orchards, vegetables contain toxic chemicals can pollute groundwater and surface water.
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