no, I don't like fish.
Actually, on rare occasions I will have some crab, and i do enjoy Maine lobster when back east (i actually wish that species would be more invasive and become a problematic alien infestation in the pacific so we could be encouraged to control populations, yum)
But with all the mercury and other heavy metals in the aquatic food chain, I'm of the opinion that less is better. I get my omega fats from capsules. I do support fish farming of course, and anything that increases the sustainability of seafood consumption.
I think that harvesting the ocean just because we wants its pretty colors in our living rooms is far less justified than harvesting for food. Regardless, both should be done sustainably.
Kalk,
The atmosphere is in fact not broken up into isolated bubbles over each nation, so the production of C02 in the US would not create atmospheric changes that are isolated to our region. From what i understand, the air in our atmosphere flows freely across national borders. (imagines a comic strip showing a cloud of C02 waiting in line at a border checkpoint to get its ID checked out)
I'm probably just going to let you use Google for future questions with common answers. You don't need me to provide you with this type of easily-obtained information.