Two towns and a public school district in Massachusetts have been picked to receive $240,000 (£166,390) in rebates to help pay for cleaner buses.
The cash will be used to fund 12 new school buses that emit less pollution than those currently in use.
The cash has been made available under the US Environmental Protection Agency’s (EPA) Clean Diesel Programme.
In 2007, EPA put into effect standards to make newer on-road diesel engines, including school buses more than 90% cleaner. However many older diesel school buses are said to remain in operation.
Congressman Bill Keating said: “Replacing old polluting vehicles is one of the most effective ways to reduce carbon emissions. According to the EPA, areas that have more air pollution also have residents with increased respiratory health issues such as asthma and chronic bronchitis.
“The beauty of this project is twofold – carbon emissions and pollution is reduced while our aging school bus fleets are updated.”
The Diesel Emissions Reduction Act programme has funded more than 650 clean diesel projects across the US since 2008, reducing emissions from more than 60,000 engines.