> For the complete documentation index, see [llms.txt](https://web3-encyclopedia.gitbook.io/web3-encyclopedia/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://web3-encyclopedia.gitbook.io/web3-encyclopedia/ethereum/energy-consumption.md).

# Energy Consumption?

### What about Ethereum's energy consumption?

Ethereumwas using a proof-of-work mechanism that consumes a large amount of energy, however, in September 2022, Ethereum underwent its biggest update yet, dubbed 'The Merge'. This upgrade switched the blockchain to a proof-of-stake mechanism which **greatly reduces its environmental footprint**.

This update could reduce the energy required to secure Ethereum by about **99.95%**, creating a **more secure network for a much smaller carbon cost**. This will make Ethereum a truly low-carbon blockchain while boosting its security and scalability.

![](/files/y6sXurwgMgEVPwHGxCLM)