Notice that rejected energy accounts for around two-thirds of all electricity generation. This energy is produced but ultimately does not go to useful work. The amount wasted annually is around 66.7 quadrillions BTU’s (“quads”) of energy.  For perspective, that is the energy equivalent of wasting 2.3 billion metric tons of coal every year.

The potential for Bitcoin-powered renewables is already evident in China. A 2019 report by Coinshares found that approximately 75% of Bitcoin mining comes from renewable energy sources, much of which stems from newly created hydroelectricity. These new revenue streams have brought power plants online which otherwise would not have been economically viable given existing

The third attack would be that Bitcoin would move 7 transactions per second and that in a nutshell for such a system even a few kilowatts now would be wasted (curious, then, that Attivissimo remembers this after accepting Bitcoin donations for years, on its blog, of this great problem).
Quickly: this number, unfortunately, arises from a profound misunderstanding of the real decoupling between the technological infrastructure called "blockchain" and the transfer of value in Bitcoin.
It is frequent, but this does not make it any less wrong.
Premise: "It's a feature!", Or rather the size of the Blockchain is deliberately small.
Being able to write on a blockchain must be a luxury, so that it remains decentralized, so that everyone, at any time and with a relatively low effort, can independently verify the correctness of transactions on the network, and not just the large banking institutions.
However, nowadays, at every moment of the day, Bitcoins, or contracts that are related to their value, are brokered and traded on cryptocurrency exchanges, on custodial platforms, by means of pegged tokens, on sidechains, on Lighting Networks, by means of CFDs. , with various levels of enforcement.
And this happens through a number of transactions that are much more than 7 per second, believe me! Claiming the opposite would be like expecting our morning coffee paid for at the bar to be recorded by all the backups of all the nodes of all the Eurozone interbank circuits.
So how many transactions, really?
In general, it is a non-measurable number, and it will be less and less, the estimates will be more and more heuristic, also thanks to privacy-preserving platforms.
We can say, to give a general idea, that every transaction that takes place on an order book of any platform, which represents Bitcoin, can only exist thanks to the fact that, underneath, there is the Proof Of Work which, when necessary, allows settlement of a precise state of a chain of transactions of indefinite length (my token goes to you, you give it to him, you give it to the other, who breaks it in three and gives it to the other, who collects 8 ). Aren't you going to expect all the coins you exchange to end up written down somewhere?
Quite simply, people every day rely on intermediaries to exchange Bitcoin value without using a blockchain directly.
The global concept of decentralization is maintained, relocation is increased with confidence in the last mile (not always! LN!) But the connection element always remains the last, only, true, mandatory, a digital ledger in which the compensation movements.
Comparing, therefore, the phantom 7 transactions (which is a number that was good in 2013, today there are many more even on-chain) to the world's ability to transact Bitcoin, and tie it to the PoW, is a bit like expecting that there are, at all times, a sufficient quantity of vans to move all the gold in all the vaults of the world that intend to exchange gold.