It depends where the port is, and where the store is. While it is true that a cargo ship produces 20% of the carbon per km per ton that a truck does, the distan

It depends where the port is, and where the store is. While it is true that a cargo ship produces 20% of the carbon per km per ton that a truck does, the distance is very large. This also does not account for freight rail which produces half the carbon per km per ton that container ships do. So yes, if a cargo ship goes the 11,000 km from China to LA, then a semi-truck takes this from LA to NY the overland route would produce more carbon. Also, the part about the raw materials not being produced locally, this is true abroad too.