I actually address this point in my post: "Many/most miners use hydroelectric power because competition compels them to use cheap renewable energy instead of ot

I actually address this point in my post: "Many/most miners use hydroelectric power because competition compels them to use cheap renewable energy instead of other polluting power sources such as coal power plants" examples: BitFury: https://www.businesswire.com/news/home/20151211005837/en/BitFury-Launch-Energy-Efficient-Immersion-Cooling-Data https://www.businesswire.com/news/home/20151211005837/en/Bit... KnC: http://thenodepole.com/2015/06/04/kncminer-to-build-new-20mw-greenfield-datacenter-in-the-node-pole/ http://thenodepole.com/2015/06/04/kncminer-to-build-new-20mw... Therefore your worry about CO₂ emissions is misplaced.