U.S. Department of Energy Energy Efficiency and Renewable Energy
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Reducing Vehicle Idling Time at School Helps Kids—and Parents—Breathe Easier

Photo of two young boys with backpacks walking past a school sign that reads &quote;Children breathing - no idle zone. Turn your engine off."

Learn how one Clean Cities staff member leveraged her professional knowledge to help reduce idling at her sons' school.

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August 18, 2016


Natural Gas-Powered Bus Rapid Transit Service Proves a Success in Colorado

Photo of a blue bus on a snowy mountain road.

Learn about the Roaring Fork Transit Authority's experience evaluating and implementing 22 CNG buses in one of the most severe regions in the country.

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December 22, 2015


Renewable Natural Gas: Repurposing Waste to Fuel Vehicles

Photo of a garbage hauler in a dump.

Learn about ways to turn renewable resources into natural gas to fuel vehicles.


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November 19, 2015


Clean Cities TV Hits Big Viewer Milestone

Image is a frame taken from a YouTube Clean Cities video showing alternative-fuel vehicles and the YouTube logo.

Videos about alternative-fuel transportation topics reach a new record of 100,000 views.

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July 24, 2015


CNG and Fleets: New Publication Builds a Case

An image of the cover of the CNG business case publication.

A new report details how to determine the financial soundness of implementing compressed natural gas for fleets.

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April 6, 2015


Propane-Powered Buses Cut Costs, Green School Fleets

A photo of an orange school bus with a propane sticker on the back.

A new case study highlights the benefits and challenges of deploying propane in buses.

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October 7, 2014