text: To begin with, Vehicles are giant sized moving objects with a lot of fuel spewing out. In article 1 it quotes; "Passenger cars are responsible for 12 percent of greenhouse gas emissions in Europe . . . and up to 50 percent in some car sensitive areas in the United States." That is an astonishing percent vehicles cause to make greenhouse gas! Is all that greenhouse gas worth to just simply move faster to where you need to be? Is your time being faster worth your life being shorter?