Minnesota Public Radio slideshow:
Lawmakers propose ship inspections to stop exotic species
<Previous1 2 3 Next>
An oceangoing ship dumps its ballast water while in port. This practice has led to the spread of invasive species in the Great Lakes. (Photo by L. David Smith, MIT Sea Grant)

An oceangoing ship dumps its ballast water while in port. This practice has led to the spread of invasive species in the Great Lakes.

(Photo by L. David Smith, MIT Sea Grant)
©2009 Minnesota Public Radio : Terms of Use