Good documentation, it really describes our current condition. But apart from all that, bitcoin mining is indeed a big problem especially for electricity. Let's find a way to make electricity for bitcoin not swell.
No it's not! Electricity consumption is not a big problem for bitcoin and mining industry. If you compare it to the electricity consumption of mainstream minting process, bitcoin mining consumes a peanut.
Yes it may be a problem for the small miners who solely depend on the government provided electricity at the retail cost. They should look for an alternate source of electricity like solar panel to be installed in their rooftop.
Otherwise, if we speak generally, bitcoin mining consumes much less electricity than mainstream government controlled minting operations.