Oh, they're different. They cost more, take five or ten times as much plastic to make, take more fuel to transport, and take up more space in landfills. Think

Oh, they're different. They cost more, take five or ten times as much plastic to make, take more fuel to transport, and take up more space in landfills. Think about just how little material the thin bags use, and think about how many of them you'd have to stack to equal the thickness of the thick bag.