[musicale]

Glass bottles are more reusable and recyclable, but transporting glass burns more fuel. Reuse requires a lot of water to wash the bottles (though perhaps washing can be made more efficient) while remanufacturing crushed glass into bottles uses additional energy.

Still I'd be in favor of going back to glass because they are nicer than plastic and soda seems to taste better in glass bottles, perhaps in part because it doesn't have to be overcarbonated.