Study sponsored by the Department of Energy shows electric shuttles will increase emissions by 40% at Zions National Park. This study does not take into consideration the latest engine technology or renewable and rDME blends of propane which would spread the gap further between clean propane and dirty electricity.
The National Renewable Energy Laboratory (NREL) in the US specializes in the research and development of renewable energy, energy efficiency, energy systems integration, and sustainable transportation.[2] NREL is a federally funded research and development center sponsored by the Department of Energy and operated by the Alliance for Sustainable Energy, a joint venture between MRIGlobal and Battelle.[3] Located in Golden, Colorado, NREL is home to the National Center for Photovoltaics, the National Bioenergy Center, and the National Wind Technology Center.
Read the study here. Check out page 43 https://www.nrel.gov/docs/fy21osti/78012.pdf
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Oberon Fuels announced commercial availability of a blend of propane and Oberon’s renewable DME (dimethyl ether).