In an effort to reduce pollution in Puget Sound, a state appeals board in Washington has ordered builders to implement low-impact construction techniques such as green roofs and porous pavement. Environmentalists hailed the new requirement, which could mean the end of curb-and-gutter road construction in new subdivisions. "It's a national precedent," said Jan Hasselman, an Earthjustice attorney in Seattle. "It's the first time a hearings board anywhere in the country has said that low-impact development techniques will be required."

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