The project's groundbreaking was delayed by a rezoning, which was opposed by some community members concerned about increased traffic and pollution, and then by the economic downturn.

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They carry a lot of unwanted baggage (trash, pollution, sewage) and too much too fast can devastate a community, like Edmonston, with terrible flooding.

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Mr Clarke said the community accepted that something had to be done to protect the mussels but it had been suggested that both pollution and climate change may have had a role to play.

BBC: Sustainability of Strangford Lough

They cite the Emergency Planning and Community Right to Know Act of 1986, which led to the development of a Toxic Release Inventory detailing the pollution habits of various companies.

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