Colleen O’Neil, of the Mountain Watershed Association, fixes a crooked sign posted near a landfill's discharge pipe that flows into Sewickley Creek in Yukon, Pa. This article originally appeared on ...

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Colleen O’Neil, of the Mountain Watershed Association, fixes a crooked sign posted near a landfill's discharge pipe that flows into Sewickley Creek in Yukon, Pa. Credit: Scott Goldsmith/Inside Climate ...