1.  The new technology requires the installation of a wall, which contains a chemical that cleanses the water as it flows through.

2.  The water is cleansed and reused.

3.  As part of a ground-breaking ozone filtration system, the water is cleansed with special filters.

4.  Environmentalists long have advocated a shallower lake, which helps the fringe marshes that cleanse water and provide habitat for birds and fish.

5.  For example, paving over wetlands is counted as positive for the economy, Whitelaw said, even though the marshy areas store and cleanse water for free.

6.  Fragile ground cover that filters and cleanses water as it flows into forest creeks is disturbed.

7.  Mussels act as kidneys for rivers, filtering large quantities of nutrients and organic material, thus cleansing the waters.

8.  Proponents note that wetlands, besides their biological richness and power to cleanse polluted waters, are surprisingly cheap and quick to recreate.

9.  So Bluepoints set out first to cleanse the water.