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Deepwater Horizon oil spill caused widespread marsh erosion, study shows

The Deepwater Horizon oil spill six years ago caused widespread marsh erosion that may be permanent in some places, according to a new analysis of 270 miles of the Louisiana, Mississippi and Alabama coasts. At the hardest-hit of 103 Natural Resource Damage Assessment (NRDA) sites, where oil covered more than 90 percent of plants' stems, widespread die-off of grasses at the marsh edge occurred, followed by up to two years of accelerated erosion as dying plant roots lost their grip on marsh soil.
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