Agriculture
Tim Bray debugs agriculture.
And if the industry did shrink, and some parts of the Prairie went back to the eternally-waving grasses, and some valleys in Switzerland were filled in by forests; well, would that be such a bad thing? Particularly if at the same time the African basket-cases were struggling from the ground to their knees and maybe their feet, and we were paying less for commodity foods at the supermarket, and saving a few bucks on taxes.