Sometimes science pulls a rabbit out of a hat that I never expected (and I expect a lot).
Some cats have figured out how to convert plastic back into oil with a microwave bombardment.
http://environment.newscientist.com/channel/earth/dn12141-giant-microwave-turns-plastic-back-to-oil.html Sounds like an excellent solution to the large mass of plastics in the ocean near Hawaii. Pull it up and make some oil out of it.
http://blog.wizzard.com/?p=91