Plastic is one of the most valuable things that can be made out of oil, and one of the things we will still use oil for when its availability is limited, simply

Plastic is one of the most valuable things that can be made out of oil, and one of the things we will still use oil for when its availability is limited, simply because the utility per barrel of oil is much larger for plastic than for fuel. Thus we will likely commute shorter distances before we cut down on plastic, though we may use fewer disposable plastic products than before.