Cleaner School Busses

The World

Some school districts in California are switching from diesel buses to those powered by cleaner-burning natural gas. Many of the oldest and most polluting diesel engines are in school bus fleets. And health experts say that diesel exhaust contributes to lung cancer, asthma and other respiratory problems, putting school children at an especially high risk. Cheryl Colopy (CAHL-o-py) reports.

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