Yep! maybe we should all just go back to the horse and buggy. Much simpler. However, the the horse has to be feed, poop cleaned, and housed somewhere. Can you just imaging folks who live in high rise apartments having the basement garages full of horse stalls! It baffles the imagination.
It doesn't matter what it is, humans are "consumers" and we have the need to consume whatever resources there are. When one resource runs out we find ways to consume something else until it's gone too. There is no sure-fire answer to anything.
