They mostly end up in landfill - sure people might take 1 or maybe 2 of their plastic bags for reuse each week but the bulk go straight back into the bin. Assuming you have say 4-6 plastic bags from shopping alone each week then that's 2-4 plastic bags that go straight in the bin after using them for say 1 hour to transport your shopping - 100/200 plastic bags that go straight to landfill from each household every year - 9 million Australian households - work out how much plastic that is that hits landfill each and every year for the hour or so you use them to carry your groceries home.
