The
1. Wastewater from home, shops and office, toilet and wash
2. Wastewater from industry with the old waste water from production system. Cooling system, residential and office buildings, shops and a cafeteria
3.The fertilizer used in agriculture, including nitrogen and phosphorus compounds
4. Surface erosion, such as bath เก็บน้ำ degradation and erosion of the face of the earth.
5.Raising livestock. If the animals eat grass cover soil too much can cause soil erosion was the water when it rains. และยากำจัดวัชพืช
6 pesticides. Most are toxic chemical
7.Forest fire, if is the source to make garbage, ashes, sediment, as well as various pollutants flowing into water
8. Land use, the lack of control. Land use, the two sides or around water resources problems
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