Japanese railway company, Tokyu, says it now uses only renewable energy to power its train operations. That means Tokyu’s huge network of train lines in and around Tokyo do not produce any carbon dioxide emissions. The change took place April 1. Tokyu employs 3,855 people and connects Tokyo with the nearby city of Yokohama. It has more than 100 kilometers of railway tracks serving 2.2 million people a day. It is the first railroad operator in Japan to have reached the goal of zero carbon emissions. It says the carbon dioxide reduction is equal to the yearly average emissions of 56,000 Japanese households. Nicholas Little is director of railway education at Michigan State University. He praised Tokyu for supporting renewable energy. But he noted it is also important to improve ways of creating renewable energy.