U.S. Department of Energy Energy Efficiency and Renewable Energy
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Back to Basics: Understanding Emissions — and How to Talk About Them

A photo of a white sign that reads 'Low emitting vehicles only' in green writing, set against a blue sky with white clouds.

Learn about the resources available to help you become an emissions expert.

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March 23, 2015


How Much Water is Required to Generate a Gallon of Fuel?

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Enhanced online model calculates the various impacts different types of biofuels have on environmental and water resources.

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February 11, 2015


Using the Enhanced Alternative Fueling Station Locator

A graphic of a map with a green pop-up and a gas station icon.

Find out how to search for, update, and add new alternative fueling station information.

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January 28, 2015


Revamped Search Tool Serves Up Alternative Vehicle Options Faster

A graphic of various small blue vehicles with one larger, green car shown under a magnifying glass.

Browse light-, medium-, and heavy-duty AFVs, engines, and hybrid systems easier with the new Alternative Fuel and Advanced Vehicle Search.

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October 30, 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


AFDC Enhancement Makes Finding Applicable Laws and Incentives Easier

A graphic of the map of the United States with the state identified by two capital letters. When you click a state on the map, you're taken to a list of incentives, laws, and regulations for that state.

Updated AFDC search capabilities make it easy to find laws and incentives applicable to you, your program, and your stakeholders.

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July 14, 2014