I guess they mean that paper bags are biodegradable and have been for ever. However, plastic bags have been used instead as they are cheaper. He says cost is wh

I guess they mean that paper bags are biodegradable and have been for ever. However, plastic bags have been used instead as they are cheaper. He says cost is what drives this so for a barley or corn plastic bag to work it has to be as cheap as a regular plastic bag or at least cheaper than a paper bag.