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Clean-water project at Hartley Nature Center shows success
News14 July 2026

Clean-water project at Hartley Nature Center shows success

St. Louis County, the city of Duluth, and other partners have implemented a green-infrastructure project at Hartley Nature Center to divert and filter stormwater runoff from 117 acres, using biochar among other materials to remediate contaminants. This initiative is significant for advanced carbon materials as it utilizes biochar, a form of carbon, to improve water quality by removing pollutants, benefiting ecosystems connected to Lake Superior.