My city Bangalore effectively enforced a plastic ban. So some grocery stores now only have paper bags even to pack veggies. I think it's doable. The government enforced the ban as there was no alternative, we don't have enough space for landfills.

A city like Singapore however uses a lot of plastic and thermocol. I wonder where they find space for their landfills. Probably they are doing the same, exporting all the trash to China or Indonesia.