As I said in an earlier answer, the problem is that nobody wants it. There are various ways of smashing it into ever smaller pieces. There are ways of pyrolysis to turn it into blocks. The efforts of recycling and the cost of recycling far outweigh the value, so somebody has to pay for it to be done.
The Europeans have this problem in an even bigger way. Landfill is so expensive in Europe, so they have to do something else. Even with the higher cost of doing nothing in Europe, it's still too expensive to turn it into a useful product.