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My understanding is that most of the mining is currently done in China and Iceland because China offered very cheap or even free electricity to stimulate industry and Iceland has access to so much 'free' geothermal electricity. China's version is hugely polluting and powered by coal and nuclear sources.

It is massively important that all computing technology is made more efficient and that is an ongoing process behind the scenes at all levels (usually). In the case of Bitcoin, my understanding is that it is quite inefficient in terms of the resources needed to mine it and there are much more efficient cryptocurrnencies from the perspective of resource usage, but I have never seen a comparison that shows how they all stack up against each other - it would be interesting to research.

Some great points .... it is also cold in Iceland and so they don't need as much electricity to power the fans to keep the kit cool. They just have a warehouses with a cold through draught I believe!

well ... people are trying :

https://news.bitcoin.com/cryptomatoes-using-excess-mining-heat-to-grow-produce/

all good things take time, mister shine, i think post milennials when scraped off the outer layer of the norm will have a slightly higher percentage of people aware of what the hell we are actually doing with this dirtball to the point of

as i like to say it ... "you can't launch a rocket on a woodstove" or as i have been shouting on every forum i can find "is there any numbers guy who can calculate how many humans it takes before all molecules on the planet are sapients" ...

and then the wind cries mary lol

the thing is will it be in time or is it already too late and are we past the point of no return, as long as theres overpopulation a number of humans will be simply treated as resources , no more no less, despite the haughty facade of mankind that's how nature works ... e=mc² ... no good or evil

but humans (the general common denominator of the word) likes to pretend they're above that

love the pic btw ...