A study launched by Towson University in Maryland and Mutch Associates seeks to evaluate the impact of stormwater runoff from copper roofs, and ways to manage it, according to this article. The research will examine whether rain gardens or grass channels can help reduce the amount of copper that runs off into waterways. "We’re committed to ensure the safe and sustainable use of copper. The study will provide risk assessments that are based on scientifically accurate data," said Joe Gorsuch from the Copper Development Association.

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