What is an NFT and how is it “bad for the environment?”

[Altera]

NFT and Cryptomining has pretty massive impact on enviromental pollution. The farms require huges loads of electricity to run and each NFT token creation is said to cost as much energy as a average household uses in 1-2 days, on 1 NFT token. Now imagine millions token made?
Also with more blockchains, more computing power is needed, which means sucking up every GPU and CPU around, and making these components also impact the globe. And the cards are usually run 100% 24/7 and prolly needs replacement GPU every year or 2.

The report states that each Bitcoin transaction consumes 1,173 kilowatt hours of electricity. That's the volume of energy that could "power the typical American home for six weeks," the authors add. The Bitcoin mining that enables a purchase, sale or transfer, it posits, uses a slug of electricity that costs $176.
https://youtu.be/Oz9zw7-_vhM?t=792

And that Square Enix CEO wants to start NFT, means SE will also contribute a lot to enviromental pollution and in Europe specially, there is a power crisis as electrical bills has risen to 8 times normal and have to start up old coal power plants to manage the increasing demand for power as windmills are not producing as its not a lot of wind lately