So much energy being wasted on mining, save the planet maaaaaaannn. But seriously, there is so much energy/power being used in mining. It's an obscene amount.
It's far less than the energy required to run the things which Bitcoin could potentially replace.
How much energy does it take a single bank to be open for business each week? Consider the land to house the bank. The materials to build the bank. The vehicles to transport the employees too and from work. The paper checks. The plastic debit/credit cards. The air conditioning/heating. The security. The customers driving to and from the bank. Et cetera. How many actual banks exist? I think there are over 6 in my small town alone.
Then you have things like the VISA network. The printing of actual fiat money (which involves growing, harvesting, and preparing cotton). The US military to protect the petro-dollar!

LOL, fiat is far more environmentally unsound.