What are the key challenges in scaling Blockchain networks?

The question is about blockchain
Answer:

Major challenges to scaling Blockchain include transaction speed, network congestion, and high energy usage. The onboarding of more users and increased transactions make Blockchains slow and costly. The obvious solutions in view are sharding, layer-2 protocols like the Lightning Network, and more efficient consensus algorithms, but the challenge is in their implementation without compromising the security and Decentralization of the network.

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