About 170 companies are racing to electrify air travel. We talked to the guy who is currently leading the pack.
Here's a puzzle: California has a greener grid, but it's carbon emissions just ticked up.
Clean energy: not a partisan issue, says FedEx's CEO. That's why he commissioned this slick little promo, which sums up everything that's wrong with our current transportation infrastructure but stops just short of mentioning peak oil. That's OK, because the facts speak for themselves: The U.S. uses a quarter of the world's oil. Seventy percent […]