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There are too many people on the planet and it's making this issue a lot more difficult. "What can we possibly replace oil with?!" With 7 billion people? We probably can't. I mean we can give it a shot—combining a thousand different alternatives at once—but ultimately it seems pretty clear that there will be a lot more walking and bike riding in the near future. If we reduce consumption of energy to moving and cultivating food, AND we reduce the population by requesting (or providing incentives) for smaller families, we might end up with an equilibrium. Well we might have ended up with an equilibrium had we started already. We haven't, so we probably won't.
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