The National Park Service has long maintained a commitment to minimizing traffic on their roads and keeping environmentally-vehicles in their fleet. According to the National Renewable Energy Laboratory (NREL), roughly 60 percent of the vehicles the Park Service maintains are electric or powered by alternative fuels. About 20 years ago, the Park Service began replacing its gasoline and diesel-powered buses with low-emission propane-powered alternatives. Now, those buses are getting old and park officials are considering upgrading to an even more environmentally-friendly alternative – electric buses. Recently, the Park Service began working with the NREL to evaluate the possibility of converting… Read more »