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Ethereum 2.0 is a series of sequential upgrades to the Ethereum blockchain, including a switch from a Proof-of-Work (PoW) consensus mechanism to Proof-of-Stake (PoS) system.
The upgrade promises to decrease energy consumption and transaction fees, while boosting scalability and improving access to the Ethereum 2.0 ecosystem. This article covers the fundamentals of Ethereum 2.0 and discusses what changes the upgrade will introduce to the Ethereum network.