Switching to a vehicle running on alternative fuel presents a clear challenge - where do you fill it up? Designed by Leonardo Academy, Cleaner and Greener Fuels is a free app that gives users interactive maps to help them find the nearest alternative fuel stations all over the U.S.

Available for both iPhone and Android devices, the app caters for electric cars as well as vehicles running on CNG (Compressed Natural Gas), Biodiesel, LNG (Liquefied Natural Gas), E85, LPG (Liquefied Petroleum Gas, also known as propane) and hydrogen. The information is based on the database compiled by the Department of Energy’s Alternative Fuels & Advanced Vehicles Data Center (AFDC).

The number of vehicles running on cleaner types of fuel is growing, especially in the electric vehicles market, where the launch of models such as Nissan’s LEAF and GM’s Chevrolet Volt is driving growth. The AFDC estimates that by 2011 there were over 850,000 alternative energy vehicles in the U.S.

Besides helping green-minded drivers find their way to fuel stations, the app also provides detailed information on blend types, as well as practical advice related to accessibility, payments and web links when these are available.

There is also an element of social networking in the app, since users can help expand the database by adding information through a dedicated website. In order to keep reliability standards high, entries by users are checked for accuracy before they are accepted and included.

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