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remove pollutants. Sandy loam soils also trap toxic chemicals by changing their electrical charges as they percolate through it. In the artificial wetlands, anaerobic bacteria consume nitrogen compounds, and heavy metals, such as cadmium, mercury, and arsenic sink to the bottom of the ponds.
These are the same benefits that make environmentally friendly technology effective in greenhouse-style wastewater treatment plants.
Some of the most innovative approaches to dealing with urban
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