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Chapter 2: Electric Vehicles Save the Environment and Energy 29Figure 2-5 suggests a possible approach. We need to look at the results wanted inthe mid-21st century and work backward—on both the supply and demand sides—tosee what we must start doing today. Clearly, it’s time for a sweeping change, but we allhave to want it and work toward it for it to happen. No one has to be hurt by the changeif they become part of the change. Automakers can make more efficient vehicles.Suppliers can provide new parts in place of the old. The petrochemical industry canalter its mix to supply less crude as oil and gas and more as feedstock material used inmaking vehicles, homes, roads, and millions of other useful items. Long before any ofthese things happen, you can do your part by building your own electric vehicle.Today!Fi g u r e 2-5 Model of balanced future energ y usage made possible b y working from future desired goalback to toda y.