This increased carbon serves as an inexpensive and continuous source of carbon necessary for biologic nutrient removal.

Peas, rice, and legumes are excellent, inexpensive sources of protein which also contain important vitamins, minerals, and fiber.

Surimi is an inexpensive source of protein.

Some hospitals consider residents an inexpensive source of labor.

They provide an inexpensive and easy-to-prepare source of protein.

It is also an inexpensive source of entertainment.

They are an important and relatively inexpensive source of electrical energy where grid power is inconvenient, unreasonably expensive to connect, or simply unavailable.

Biochemical and industrial processes can provide inexpensive sources of chemicals that have normally inaccessible substitution patterns.

These chlorogenic acids could be a valuable, inexpensive source of antioxidants.

Night shelters were also strategic concessions: they acted as an inexpensive, "stopgap" source of minimal care where orphanages had failed.