Ships must kill off the beasties in the ballast water - Homework Help - Invasive Species

Ships must kill off the beasties in the ballast water

http://www.newscientist.com/article/mg21729106.000-ships-must-kill-off-the-beasties-in-the-ballast-w

Ships must kill off the beasties in the ballast water,
April 1, 2013,
By Fred Pearce,
New Scientist,

All-text article.

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