Shouldn't we concentrate our efforts on using clean renewable energy, rather than restrict our use of it?
Yes, but how sustainable is growth going to be? On what rate and how much can we keep providing renewable energy when the usage grows potentially exponentially? If we can actually have a PoS solution, why not explore that (and i know we are but i am responding to your question) instead and actually contribute to growth solution. Currently we are shooting ourselves in the foot and blaming the bullet manufacturers should just make only rubber bullets.