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Growth of Mining on Land May Promote Invasions at Sea

Written by: Sarah Zielinski
Narrated by: Mark Moran
Length: 3 mins
Categories: Science & Math

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Publisher's Summary

Some 90 percent of the world’s trade spends at least part of its journey at sea. Ships carry everything from oil to cars to food to rubber duckies. They also carry huge amounts of ballast water to increase their stability. When the weight of the water isn’t needed - because the ship has taken on cargo, for instance - it gets discharged.
©2015 Science Service (P)2015 Science Service

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