Dams are a critical part of modern civilization, providing water to those in need, irrigating farms, preventing floods and generating 17% of the world's electricity.

But there is another side of dams that we should consider. What are they doing to the environment, and what can engineers do to fix this problem? In order for us to keep benefiting from all of the great things dams bring to us, we'll need to learn to protect the environment as well.