3. Prevent and eliminate sewage By using the material or other means. In order to prevent toxins that are dangerous, such as the sulfur content of oil and coal rocks used as fuel, which causing the dirty air
4.Reduce the amount and kind of rubbish. Arising from the combustion in the furnace and the engine, including the control of exhaust muffler of automobile, etc.
5. Prevent, reduce the formation and release of waste. Make directory.By changing the manufacturing process or various tools such as the use of electricity or are ไอน้ำแทน engine using oil as fuel,
6.The separation wall. Out of the air before it is released to the air outside, such as by burning
7. Planting trees and take care of trees. Which will help to filter air to air.
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