Wow. Our experiment is off to a great start—let's see if we can finish it off sooner than expected.
Still unconvinced that your driving habits contribute to global warming? Americans consume more than a quarter of the world's oil but make up less than five percent of its population. Transportation accounts for more than 70 percent of the United States' oil consumption. Trucking accounts for a big chunk of that number, but non-essential individual trips do, too.