Analysis: mining bitcoin uses 91 TW/h of electricity annually, ~0.5% of all electricity consumed globally or 7x Google's total usage, and grew 10x in five years (New York Times) - New York Times:
Analysis: mining bitcoin uses 91 TW/h of electricity annually, ~0.5% of... - http://www.techmeme.com/210906/p5#a210906p5