Great Lakes freighters may have to treat ballast water - Star Tribune
Great Lakes freighters may have to treat ballast water Star TribuneMore than $375 billion in cargo — iron ore, coal, cement, stone, grain and more — has flowed between Great Lakes ports and foreign nations since 1959. That is ...
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More than $375 billion in cargo — iron ore, coal, cement, stone, grain and more — has flowed between Great Lakes ports and foreign nations since 1959. That is ...