Green sewer system a tourist attraction in Portland, Ore.

03/29/2010 | USA Today

While city sewers are not usually a tourist attraction, Portland, Ore., draws visitors to its eco-friendly sewer system. The city encourages residents to disconnect gutters from the storm-water system and install rain barrels to collect water instead. Portland has also installed rain gardens on 300 roofs and built curb extensions with plants or trees to replace storm-water drains.

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