My family have fished this river for 300 years - now pollution has killed all the fish

A family has fished in a river for 300 years. Now, pollution has killed all the fish. This river was also fished by US President Jimmy Carter. The family is sad because their tradition might end.

The river is important to the family. They have caught fish there for many generations. But now, the water is dirty. The fish are gone. The family hopes the river will be clean again.