PoW vs DPoS:
Contrary to popular belief, 101 single-purpose servers are far more decentralized than thousands of miners lumped on a few mining pools;
not to mention the fact that with PoW, you have an ongoing arms race to become the most powerful miner,
leading to an ever increasing energy consumption of the whole network bottlenecked through these pools.
The Lisk Network has no such difficulty adjustments, and is extremely eco-friendly.
Every pool is just 1 server in the network, not a bottleneck.