And this will keep going up along with the price rise, halving should help though. It is becoming a problem, we already have China proposing progressive caps on mining energy usage, now there's Iceland with their bitcoin mining tax proposal:
https://www.newsbtc.com/2018/02/12/iceland-may-implement-bitcoin-mining-tax-energy-consumption/
Also:
http://metro.co.uk/2018/02/11/iceland-use-energy-mining-bitcoin-powering-homes-year-7304155/
It's all fun and games until mining causes energy shortage resulting in costs of living going up for everyone in affected region.
thank you for your comment and article links. The issue of bitcoin/altcoin mining extreme energy usage exists. The crypto community can't ignore it. If we benefit from cryptos, we should face the music of its negative impact on the world environment.
It's another side of the medal=coin, so to say. The possible solutions should be brainstormed, discussed and further implemented by the community.
If we cut out everything that has a "negative impact on the world enironment", there would be not much left...