**⚡ Ethereum 2.0: Transition to Proof-of-Stake and Sharding (3/4)**
To become faster and cheaper, Ethereum underwent a major upgrade:
🔹 **Key Changes:**
✅ **Proof-of-Stake (PoS)** – mining replaced by staking (less energy, more speed)
✅ **Sharding** – parallel chains to increase throughput
✅ **Reduced fees** (Layer 2 solutions: Arbitrum, Optimism)
📌 **Conclusion:** The network is now more environmentally friendly, and transactions are cheaper. But the full transition took years!
