Grassroots lobbying groups and a relatively small number of politicians have been pushing the US government for more environmentally friendly measures to be put in place, particularly in the field of automotive travel. Vehicles in the US just aren't all that efficient, energy-wise, and on top of that, the most popular vehicles are SUVs and consumer Humvees that can be measured in dinosaurs per mile, and not miles per gallon. The hell of it is, there are much more efficient vehicles in use in Europe that get between 40 and 80 miles per gallon of fuel (averaged between city and …