Originally Posted by
old's'cool
Unless you're talking about CO2, pollution is basically a local problem, i.e. where there are large concentrations of human activity. Ships at sea don't contribute to the pollution problems in Los Angeles, or Beijing, for example.
That said, I'm all for conserving fossil fuels, and reducing pollution where it is a problem.
I'm not so sure. Groundwater pollution, acid rain, ocean acidification, animal migration, sea food, storms, global warming.... The later is certainly not just a local problem.