What’s the greatest threat to our planet? Is it nuclear war, overpopulation, automobiles, cow flatulence, pestilence, aliens? Nope. The greatest threat to our planet is … Cul-De-Sacs That’s right, cul-de-sacs, tract lawns, private homes, strip malls, traffic jams, subdivisions, franchise-built parking lots, three garages, clogged roads, 20 minute car trips to work, church, eat, shop, [...]