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In reply to the discussion: FDA Quietly Pushes Through Genetically Modified Salmon over Christmas Break [View all]reACTIONary
(5,768 posts)...and I'm also sure that remediation is possible. But the simple fact of the matter is that agriculture is the willful bending of nature to mankind's purpose and thus has some sort of a detrimental affect on the state of the natural world.
For instance, if you have to restore soil fertility through proper grazing techniques, it means that you have, at some point, depleted it.
I think that corn is used to feed cattle, but not salmon - salmon are carnivorous. Farmed salmon are fed a meal made up of other wild fish and marine organisms, and thus farming does not alleviate the burden on the fishery. It shifts that burden to other species. Salmon is a keystone species in many ecologies, however, so farming may be the better practice for more than just economic reasons.
There seems to be an effort to replace marine protean with vegetable protean in salmon farming operations, however, and that would be even better for the fisheries. But then we would be back to relying on large scale corn and soy farming. And so it goes....