Question

Fill in the blank to complete each statement.

The land that supplies water to a river system is called a
.

Pollution from a single, identifiable source is called
source pollution.

Pollution that is difficult to link to a particular origin is called
source pollution.

Answer 1

The land that supplies water to a river system is called a **watershed**.

Pollution from a single, identifiable source is called **point** source pollution.

Pollution that is difficult to link to a particular origin is called **nonpoint** source pollution.