A major public works project featuring a nearly three-mile-long tunnel will reduce runoff and sewage entering Puget Sound during heavy storms, and we’ll take you inside. On a smaller scale, the city of Seattle is working with private developers to use bioswales to prevent polluted runoff from entering storm drains. New federal tax credits are leading to a boom in rooftop solar installations. But are they effective in gray Seattle? Host Enrique Cerna has these stories in a special Earth Day CityStream from Discovery Park.

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