If you perform electrolysis of sea water the main products given off would be hydrogen and bleach, both of which could be piped or shipped (if you filled an oil

If you perform electrolysis of sea water the main products given off would be hydrogen and bleach, both of which could be piped or shipped (if you filled an oil tanker with hydrogen, would it be lighter than air?) back to shore. Although a leak of bleach into the ocean may not be very good, it's probably no worse than the damage done from oil.