Transportation

When the St. Lawrence Seaway was opened 50 years ago, it promised to move the ocean 1,000 miles inland, boost commerce, and light cities. But some think it has been an environmental nightmare.

If you’re thinking about buying a cleaner, more fuel-efficient car, you might think a hybrid is your best option. But some automakers want people to look at an older technology when they’re looking for green cars: the diesel engine. The Environment Report's Julie Grant reports.

The high-speed rail system in Spain is a huge success, and offers some lessons for Obama administration officials seeking to develop something similar in the U.S.