We know that the landfill capacity in Canada is put through a stretch in some areas. Currently, if waste exported to the U.S. contains some plastics that are listed in the proposed schedule 7, that would mean it could no longer travel to the U.S. That would probably put a stretch on some provinces' capacity to manage it.
Evidence of meeting #19 for Environment and Sustainable Development in the 43rd Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was chair.
A video is available from Parliament.