Taking the Soybean Bus

After Barbara Niehauser put new white siding on her Cincinnati, Ohio, home three years ago, it soon showed signs of blackening – again. “My Neighbor asked,‘Whats wrong with your house?’” Niehauser recalls. “I told her, ‘It’s the buses.’” Belching diesel buses stopping and starting right in front of Niehauser’s house used to emit murky clouds of exhaust.