I remarked the other day that I was worried about the role of free disposal in many important proofs in microeconomic theory, because it may well be that things like pollution or other 'noxious goods' may not be disposed of simply.
However, gentle reader, worry not. Simply include these nuisances as inputs to the problem! For example, if your factory produces carbon dioxide as part of the production process, include carbon dioxide permits as an input. Yes, the price may well be zero. In general it seems for any undesirable effect of production that needs to be disposed, one can include its disposal and price of disposal as an input - and the proofs go through. Rejoice.
POSTSCRIPT: A prayer service for the auto industry, courtesy of The Unbroken Window - the other Rochester-based econoblogger. I don't think he knows me, though, even though we work in the same building. To be fair, I don't know him, either.