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Environment Canada

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Container ship. Photo: © COREL Corporation, 1994.

Balancing Act: Ballast Water Treatment Technologies to Address Invasive Species Problem

Shipping moves over 90 per cent of the world's commodities and transfers approximately 3 to 5 billion tonnes of ballast water internationally each year. While ballast water is necessary to properly balance a ship, it is also a significant source of invasive species and a major environmental concern from the Indian Ocean to the Great Lakes.

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