The quality of water has been cooled waste (waste water and industrial residue) into the water supply, water quality, less in the bile up sources. Result in ecological source of bile along with it.
The water quality A waste (Sewage and industrial waste) into waters less. The water quality in water resources better. As a result, water resources, ecosystems, good as well.
The water quality, the discharge of waste water and residue (industry) into the water resources less, do the quality of water better. Result in ecological water source well too.