David, interesting analysis. I like the hard numbers. Though I appreciate the data, I wonder what if anything can be done? Art has lots of waste inherent in its nature. I am sure one who works in stained glass might have waste inherent to the process. I personally try to do the most to minimize my waste without compromising on vision/quality, etc. (eg I bulk load my 35mm), and do think it a nice discussion on consumption. Thankfully I dont consume much (from a hobby standpoint), though I could spend my hobby watching TV; I would rather 'waste' some film here or there than the alternative of watching TV and only consuming power!