The Super-Green Big-Rig Truck

It's no surprise that engineers and designers are furiously trying to green long-haul tractor trailors. Just like airplanes, the profit margins are small, so ekeing out a 10% improvement in fuel efficiency is big news. And commerical transport represents a massive chunk of the carbon footprint in our goods--so much that it often nullifies the good intent of organic produce. But what might surprise you are the ways in which engineers are making big-rigs greener.