Science of cleaning oil from ocean marshes
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![Louisiana coast](https://img.apmcdn.org/0b534a3873682d9d91ae341752df474ca187257c/uncropped/ba7e97-20100608-oil-spill.jpg)
Oil from the Deepwater Horizon spill pools against the Louisiana coast along Barataria Bay June 8, 2010.
Charlie Riedel/ASSOCIATED PRESS
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