[Wowfunhappy]

To play devil's advocate a bit: If most of the plastic bags in NYC were coming from New Jersey, that wouldn't be a reason to allow them in New York. It would just emphasize that they should be restricted in as many jurisdictions as possible.

[balfirevic]

I don't think that particular reasoning works - perhaps New Yorkers (hypothetically) behave very nicely and properly dispose of plastic bags, so there is no need for ban.