Natural gas has not proven popular for vehicles bought by individual consumers, but some fleet operators continue to find it an attractive alternative to gasoline and diesel. That's because the lack of public fueling infrastructure proves a major drawback for natural-gas passenger cars, but fleets can circumvent that by operating their own... UPS to spend $90 million more on natural-gas vehicles, fueling stations
Natural gas has not proven popular for vehicles bought by individual consumers, but some fleet operators continue to find it an attractive alternative to gasoline and diesel. That's because the lack of public fueling infrastructure proves a major drawback for natural-gas passenger cars, but fleets can circumvent that by operating their own... 
Cars and trucks aren't the only source of transportation-related carbon emissions. The massive ships that ply the world's oceans are major sources of pollution as well, but generally receive less attention from regulators. But one cruise line is now taking steps to reduce the environmental impact of its fleet. DON'T MISS: Cruise ships start to...