Isn't a lot of mining done in places where electricity is cheap and/or clean, such as hydroelectric in China and geothermal in Scandinavia?
https://en.wikipedia.org/wiki/Electricity_sector_in_China
Also it doesn't seem to me that Scandinavian countries are particularly active in mining. Understandably, since electric energy there isn't cheap.
I think the argument is you can put that energy to better use than mining bitcoins.
https://en.wikipedia.org/wiki/Electricity_sector_in_China
I did some research, and it doesn't seem that the mining farm in Iceland is even comparable to Chinese ones in terms of hashrate. Do you have any source?