Ummm, "omelette -> egg" is a lot harder "plastic -> plastic monomers". And really, if you want to convert omelettes to eggs, you just feed them to chickens. And

Ummm, "omelette -> egg" is a lot harder "plastic -> plastic monomers". And really, if you want to convert omelettes to eggs, you just feed them to chickens. And eventually, you feed unmarketable chickens to pigs.