Bilbao, Spain, has a subway system that is famous for having its stations designed by Sir Norman Foster. There's now another reason that people might be interested in riding the underground rails. Metro de Bilbao, the company that manages the railway system, has announced that all the energy they used during 2008 was obtained from renewable sources and was supplied by Naturgas, a local utility. The company claims that the suburban train system has saved 46,000 metric tons of CO2 per year, about the same as taking 8,000 cars, each driven for 30,000 km (about 20,000 miles) per year, off the road. Metro de Bilbao also announced the installation of brake energy recovery systems that not only stop the trains more effectively but also get energy savings of 33 percent.