"By halving its top cruising speed over the last two years, Maersk cut fuel consumption on major routes by as much as 30 percent, greatly reducing costs. But the company also achieved an equal cut in the ships’ emissions of greenhouse gases. “The previous focus has been on ‘What will it cost?’ and ‘Get it to me as fast as possible,’ ” “But now there is a third dimension,” he said. “What’s the CO2 footprint?” Traveling more slowly, he added, is “a great opportunity” to lower emissions “without a quantum leap in innovation.”" (Quoted from article)