U.S. Department of Energy Energy Efficiency and Renewable Energy
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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


Filling Up a CNG Vehicle Tank

A graphic of a cylindrical purple tank with red dots inside to represent natural gas in a CNG vehicle tank.

See how variables such as temperature and fill rate affect how a CNG vehicle's tank fills with gas.

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September 11, 2014


VICE Model 2.0 Released

Photo of a compressed natural gas vehicle

Clean Cities launches improved tool to help fleets evaluate CNG investments

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January 27, 2014


UPS to Expand Use of Liquefied Natural Gas

Photo of a natural gas vehicle

The long-time Clean Cities stakeholder will invest $50 million to build nine new LNG fueling stations.

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October 25, 2013


States Enact Natural Gas Vehicle and Infrastructure Incentives

Chart showing the number of states with natural gas incentives in six categories: tax credit (25), rebates (4), grants (16), loans and leases (17), acquisition requirements (41), and other (18)

During the first part of 2013, several states enacted legislation pertaining to natural gas vehicles and fueling infrastructure.

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October 23, 2013


Spotlight on Natural Gas

Photo of buses

Clean Cities Top 20 Facts


#6 Nearly 63,000 natural gas vehicles in service

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August 2, 2013