U.S. Department of Energy Energy Efficiency and Renewable Energy
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Spotlight on Propane

Photo of a propane vehicle being fueled

Clean Cities Top 20 Facts


#9 More than 250 million gallons of petroleum displaced since 2004

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August 23, 2013


The Technical Response Service

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Clean Cities Top 20 Facts


#8 Clean Cities has provided top-notch technical assistance for more than 20 years

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August 16, 2013


Success Stories and Case Studies

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Where can I find case studies and other information about fleets that have successfully adopted alternative fuels and advanced vehicles?

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August 16, 2013


Spotlight on Fuel Economy

Chart showing that in general fuel economy decreases as speed increases over 50 mph

Clean Cities Top 20 Facts


#7 Small changes can make a big impact

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August 9, 2013


Spotlight on Natural Gas

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Clean Cities Top 20 Facts


#6 Nearly 63,000 natural gas vehicles in service

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August 2, 2013


Clean Cities Online Tools

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Clean Cities Top 20 Facts


#5 More than a dozen tools help stakeholders deploy alternative fuels and vehicles

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July 26, 2013