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.

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?