What do you mean by "I'm certain that it is far more then what car needs"? Let's guess that a car weighs about 3000 lbs, and then let's guess that a bike weigh

What do you mean by "I'm certain that it is far more then what car needs"? Let's guess that a car weighs about 3000 lbs, and then let's guess that a bike weighs about 20 (obviously there is large variance). Mining or producing all those resources produces pollution, we can even generalize it to be similar levels of pollution. The 3000 lbs. of raw materials times the pollutant level will, by far, be the dominating factor in the 'how much pollution did creating this thing create' equation.