26 May 2020,

Water flows a long and winding path from the sink to the ecosystem, but not before making an all-important stop at a waste water treatment plant. It’s more than just cleaning out dirt and debris we can see; it’s about removing invisible contaminants that could poison nearby waters. Arash Arabasadi reports from Washington.
Originally published at – https://www.voanews.com/a/worlds-largest-advanced-water-treatment-plant-at-work-in-dc/4058475.html

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