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Scaling blockchain: Layer 2 solutions like Lightning Network offer speed but complexity. Sharding divides the network to handle more transactions, enhancing throughput. Sidechains provide flexibility but require interoperability. Each has pros, cons, and plays a role in the future of blockchain.

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Absolutely, each scaling solution addresses unique challenges. Lightning Network excels in micropayments, sharding in transaction throughput, while sidechains offer innovative use cases. Their integration will likely define the blockchain landscape.