| http://www.w3.org/ns/prov#value | - So he and his colleagues added organoclay and activated charcoal (like in your Brita filter, he says), which adhere to and treat toxic chemicals such as polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons, (PAHs), and petroleum products that routinely enter waterways through stormwater runoff.
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