Ethereum 2 doesn't need a lot of electricity
Ethereum 2 (also known as Eth2 or Ethereum 2.0) is a major update to the Ethereum network that aims to improve its scalability, security, and decentralization. Eth2 uses a new consensus mechanism called proof-of-stake (PoS) that is designed to be more energy-efficient than the proof-of-work (PoW) mechanism used by the current version of Ethereum (Ethereum 1.0).
In proof-of-work systems like Ethereum 1.0, miners compete to solve complex mathematical problems in order to validate transactions and add new blocks to the blockchain. This process requires a significant amount of computing power and electricity, as miners must continually run their equipment to have a chance of winning the competition and earning rewards.
In contrast, proof-of-stake systems like Eth2 do not rely on miners to validate transactions and add new blocks to the blockchain. Instead, they use a system of validators who "stake" their own cryptocurrency (in this case, Ethereum) as collateral in order to participate in the consensus process. Validators are chosen to create new blocks proportional to the amount of Ethereum they have staked, and they earn rewards for their work in the form of newly minted cryptocurrency.
Because proof-of-stake systems do not require miners to perform resource-intensive computation in order to participate in the consensus process, they are generally considered to be more energy-efficient than proof-of-work systems. While it is difficult to quantify exactly how much electricity Eth2 will use compared to Ethereum 1.0, it is likely that it will use significantly less energy due to its use of proof-of-stake.