It's not as simple as that really. For many years the emphasis has been on reducing energy, reducing fuel consumption. Glass is heavy and bulky, so it takes more fuel to move the same amount of 'product'. 'Back in the day', produce wasn't moved around to the extent it is now so the costs for moving stuff and the need to keep it in air tight packaging to extend shelf life weren't nearly as much an issue as they are now. We would have to completely restructure our supply chains to go back to local supply and distribution, rather than the vast and centralised systems that our supermarkets use now. And given the cost of fuel now, inevitably prices would go up.Or you could just shop locally and stay away from the supermarkets.