The river has provided an important source of power in the past.
This provided a source of good jobs in the area.
Either way, it is important to provide a safe source of power.
The mass media provide a further source of material for research.
This has provided a major source of income for the community.
The stream was still near enough to provide a source of water.
This will provide an alternative source of energy for those in the community.
This can provide an important source of revenue for your business.
This area provided a natural source of the needed clay.
Visitors provide an important source of income for the Park.