The crustaceans with the highest public demand are shrimp and lobster. One problem with eating these is that their shells are difficult to dispose of and they must be burned to get rid of pathogens which they produce. In Europe FAOSTAT estimates more than 750,000 tons of crustacean shell waste produced every year. Europe has begun to fund a program called ChiBio which uses these shells to make petroleum which can later be turned into plastic. They plan to break down the shell waste into the basic building blocks which are used in the making of nylon. Many disapproved of the project saying that the process will later be commercialized making farms to breed the shrimp needed to get the best product.