Is Proof-of-Stake or Proof-of-Work better for the environment? Contrary to mainstream beliefs, the question is debatable.
mining
Understanding Blockchain Technology Part 3/4 – Mining and Proof-of-Work
Mining is how new bitcoins are generated, and while the use of hash functions makes any changes to the blockchain visible in the network, the mining process is what makes data on the blockchain infeasible to tamper with.