Neither apparently, as far as being green goes. We  know the best option is to carry a stash of canvas or re-useable bags when we go shopping, but there are times I forget to do this. Having to choose between the two was a grey area for me, and I’ve always wondered what would be the lesser of two evils for the environment. The Washington Post printed an informative diagram some time ago, weighing the costs and consequences of paper or plastic.