DAMS
- Block salmon
- Stops minerals getting to other side
- Stops flooding
- Kill fish
- Stop flow of water
"Dams block the passage of salmon and steelhead between spawning and rearing habitat and the Pacific Ocean."
"Pollution happens when rainfall, snowmelt, wind, or irrigation water run over the land or through the ground and picks up pollutants and deposits them into streams, lakes, or groundwater."