Usually when people talk about converting to renewable energy, the conversation covers what it would actually take to replace fossil fuels. It’s a good conversation to have, and a lot of good work has gone into working out how much surface area would need to be devoted to wind and solar, what other sources of power could be used, how much it would cost in the short term, and how much it would save in the long term. The end result of all this is that converting the United States – one of the highest per-capita energy consumers in the world – to renewable energy is entirely doable. The only thing lacking is political will.
That said, why stop at what’s needed?