Interesting article addressing the risks of using copper in human structures for its antimicrobial qualities. Copper resistant bacteria could prove to be a risk for human health, as certain parts of the human immune system (notably macrophages) utilize it to dispatch potentially dangerous microbes. While many places use copper as a safety measure against harmful bacterial growth, over-use may lead to more resistant and possibly pathogenic bacteria. Link to the full article is here: Copper Resistant Bacteria