Are NFTs bad for the environment?

NFTs are at least partially responsible for the millions of tons of carbon dioxide emissions generated by the cryptocurrencies used to buy & sell them.

Cryptocurrencies are built on a system called “proof of work” to oversee transactions.

The system forces "miners" to solve complex puzzles for a reward.

The process is incredibly energy inefficient on purpose, making the "miners" use up inordinate amounts of electricity (that they have to pay, for making it less profitable for them to mess up).