Long-running public television program MotorWeek put green school buses in the spotlight with a recent segment on Lower Merion School District.

The Ardmore, Pa., district has close to half of its 114 buses running on compressed natural gas (CNG). MotorWeek's Clean Cities Success Stories spot notes that the district plans to go all-CNG when more fueling stations are available.

"There are additional manufacturers that are coming out with new engines and new equipment, so it will be more cost-effective," Gerald Rineer, transportation supervisor for Lower Merion, says in the segment. "We’re optimistic that it’s the right thing to do, and it's going to help clean up the environment."

The district works with Greater Philadelphia Clean Cities for its CNG school bus program.

MotorWeek host John Davis says that Lower Merion School District "is showing its long-standing commitment to sustainable eco-friendly practices in the Delaware Valley."

To view the segment, go here.

MotorWeek has done Clean Cities Success Stories segments on other school bus operations, including Kansas City (Kan.) Public Schools and Michigan's Dean Transportation.