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After reading your article I still don't understand how you come down clearly on the side of plastic bottles. You're comparing the greenhouse gas emissions from 6-packs of cans to 2-liter bottles, is there any evidence that these are the most popular units of purchase for soda? Mightn't it be more accurate to compare single cans to single 20 oz. bottles? And again, with the transportation issue, do we really know in what configuration bottles and cans are being transported? Is there external cardboard case packaging that might serve to equalize the weight difference between the two? And your third strike against aluminum lies in the fact that recycled plastic sometimes becomes clothing (this after stating that only 30% of plastic is recycled versus over 50% of aluminum)?
Even taking your facts at face value (I haven't any of my own handy with which to counter them), your declaration of plastic as superior seems like arbitrary numbers-fiddling, at best.
