Quote:
Originally Posted by legion
How does a ferry going between islands in the ocean spread invasive species?
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There are a dozen or more ways, but often it is in the ballast tanks that are used and flushed periodically to trim the ship.
As a biologist, I regard that as a significant problem.
Yes, the airplanes are tightly controlled as Wayne noted. The whole idea is to make it as transparent as possible to human passengers. That's why you don't notice anything usually.
I don't know re the Hawaiian Islands, but in some cases the entire cargo compartment has been flushed with deadly gases to prevent some of the mistakes of the past with invasives.