https://motherboard.vice.com/en_us/article/7xmvbq/bitcoin-energy-science-world-electricity-demandNow Motherboard is not the best source for news, but let's consider the implications of this...
Consuming immense amounts of energy is actually somewhat counterproductive if we consider the vision of Bitcoin giving us tools for independence. And it's somewhat unethical because we should not be using more than we need on this earth.
However, we don't really know how much energy it is consuming at this stage, so this could just be another reporter trying to find a story.
First and foremost, energy is not issue at all it does not matter how energy you produce as long as you earn more money from it, energy is not issue. But in terms of consuming energy that involves economy, we could say that it is too much energy are produced but, since solar power are already implemented we cannot assure that this are enough to mine a coin successfully. But back to the topic, like waht ive said energy is not issue at all as long you earn money it does not matter.