> lighter cars use less fuel even without changing the % of waste energy generated. Yes, but they reduce the total Joules of energy wasted, and that's the impo

> lighter cars use less fuel even without changing the % of waste energy generated. Yes, but they reduce the total Joules of energy wasted, and that's the important point. And that would be reflected in the graph at hand. I know we're all talking percentages, but the graph is actually about total quantity. If everyone were in very light cars, the transportation bar would be narrower, and the total energy going to the Waste node would be smaller. So it's accurately reflecting any efficiencies of that kind.