Trucking companies are using software to help identify optimal places for drivers to refuel and the most efficient delivery routes. Waste haulers are checking tire pressure twice a day instead of every couple of days. We're all wasting less. Vespa scooter sales increased 106% in May compared with the same time last year; Ford SUV sales dropped 55% in June. Columbia, Md., resident Glenn Conrad, 58, bought a Honda Insight a few years ago and, like many so-called hypermilers, became obsessed with his miles-per-gallon gauge. "That thing is really addictive," he says. Although a police officer recently gave him a warning for going too slowly, he is undeterred. "If I roll both of my windows up," he says, "I instantly get about two more miles per gallon."
— With reporting by Maya Curry