I think it's more an issue of resources rather than raw energy. If this can be produced using much less space, locally to consumers, and using clean energy then

I think it's more an issue of resources rather than raw energy. If this can be produced using much less space, locally to consumers, and using clean energy then it's a net gain. What I'm interested in is where do the raw materials come from? I suppose this needs a number of "ingredients", including proteins, that must be sourced from somewhere.