The Ebba Maersk, cruising at half speed. Photo via Svenning B. Jensen

Until two years ago, the Danish shipping conglomerate Maersk had been sending its cargo ships across the seas at full throttle, vying to get supplies to their destination as fast as possible--and every other shipping company was doing the same. It seemed at the time the most efficient way of doing business. But in order to do so, the company was running its ships at far beyond the maximum fuel efficiency levels. So, two years ago, Maersk decided to slow things down. Now, a trip that used to take 3 weeks inst...Read the full story on TreeHugger