Rich in lather, mixed with oil, black– brown water that goes down the drains from sinks, showers, toilets, laundries
is dirty. It is called wastewater. This used water should not be wasted. We must clean it up by removing pollutants.
Rich in lather, mixed with oil, black– brown water that goes down the drains from sinks, showers, toilets, laundries
is dirty. It is called wastewater. This used water should not be wasted. We must clean it up by removing pollutants.