STOCKHOLM (AFP) - The world's first train to run on biogas, a renewable energy source made up of organic waste, made its maiden voyage in Sweden, a country that has high hopes for biofuels. "The train left on time, at 2:32 pm (1242 GMT) and everything is going well," said Peter Unden, head of marketing at Svensk Biogas, the company that owns the train. The train which links the city of Linkoeping, just south of Stockholm, to the east coast town of Vaestervik some 80 kilometers (50 miles) away, is scheduled to make one trip a day to begin with,...