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'Fracking' brings new business to Duluth port

New cargo is arriving in the Twin Ports. Ships are delivering "frack" sand from Russia bound for western oilfields. Hydraulic fracturing, which is used to break up rock and release oil and gas, has stirred up some controversy because of environmental worries.
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New cargo is arriving in the Twin Ports. Ships are delivering "frack" sand from Russia bound for western oilfields. Hydraulic fracturing, which is used to break up rock and release oil and gas, has stirred up some controversy because of environmental worries.

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First departure from Twin Ports marks the start of the 2012 shipping season

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First 'saltie' of Lake Superior's shipping season arrives in Duluth harbor

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