usefulness

One student used the opportunity to describe the history and usefulness of clothing swaps, which she first learned about in the class.

The trouble is, when they outlive their usefulness, they become waste and end up polluting our oceans, rivers, soils and bodies.

But a number of statisticians have publicly questioned its usefulness.

Together, they stress important things to keep in mind when creating protected areas and when assessing their usefulness.

Phosphatase, for example, relies on breaking down a form of phosphorus that could become more scarce in the future, so its usefulness may be limited.