A Genuine Question

Not to be facetious...but paper or plastic?

No, seriously.

Those paper bags cut down loads of trees.

The plastic ones never biodegrade and kill baby seals and stuff.

So, I suppose the ones made out of cloth with catchy slogans are my best bet (if I can remember to bring them along), but aren't those made by kids in sweatshops? Or even if not, is the cost of manufacture thingy? Ohh who knows. All the reefs are getting bleached and no one will tell me what way of carrying my groceries will stop it.