Can we run our society on alternative / green energy?
We know we need to get off of fossil fuels. So what should we do? I think it's possible that the green energy movement sees this question from a practical, marketing perspective. (Of course not everyone, but let's say a large fraction.) That is, it's thought to be hard to sell people on a low-energy life, so instead we should sell people on alternatives that will let them more or less keep their current lives. But that's entirely a question of marketing, not of whether it's achievable.
What I'd like to address is whether it's possible for the world to seamlessly transition to alternative energy.