After researching this subject it became clear to me that plastic bags, though useful, are very very wasteful. It takes oil to create them, which is oil that can be used on other things that are much more important. At the rate that they are made, and the fact that they can't be made into other things is just a set up for them to be littered all over the place. They take so long to decompose that since they were first created, no one has seen a plastic bag decompose. Basically we don't even know if they can, we just assume they can, but in about 500 years, maybe one will start to break down.