Several Massachusetts towns are using pervious pavement as an alternative to storm drains and retention ponds to reduce water pollution caused by rainwater runoff. Cities have used the porous concrete, which allows rainwater to seep through it, in sidewalks and a parking lot. "Rather than digging big storm drains and retention ponds, the argument is to distribute these throughout a landscape, subdivision, or property," said Savos Danos, general manager of the Electric Light and Water Department in Littleton, Mass.

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