On Target: Aug. 7, 2008

Laidlaw Transit, the nation’s largest school bus company, will reduce diesel exhaust from its fleet in California after it settled a lawsuit Wednesday, lawyers said. The company, which provides bus service in San Francisco, will invest at least $4.7 million to continue placing air-pollution control devices in its buses that are more than five years old. The company will also either retrofit other buses or buy new vehicles that meet air-pollution standards, the attorneys said.