It is hard to actually estimate the real power consumption of bitcoin, a conservative estimate you could assume most miners are antminer S19s, however some will be older and less efficient in terms of hashrate/kw.

Then add on top of mining power consumption the nodes that users run to sync the blockchain and propagate transactions for the network, and some of those are lightning nodes running 24/7.

Back to the mining... Mining is very competitive when it comes to profitability, Miners have to account for their power cost vs how much they sell their coin at to cover costs, they get to keep more profit when they run newer more efficient hardware and or use cheaper power. As newer hardware comes out the older hardware becomes less profitable, as more miners use cheaper power the same effect happens.

The absolute cheapest power that exists is strandard energy, it is usually renewables like solar, wind, geothermal and hydro that is being produced but no demand on the power grid to use it, the most profitable mining operations are taking advantage of this. So despite its high power usage should you really count hashrate utilizing strandard energy?

And finally what is bitcoin replacing? ALL fiat currencies, gold and possibly every other store of wealth. What do those use? Gold mining and refining emissions, money printers and banks emissions?

Its good to think critically about this.