Benchmark 7E
Human Society: Political and Economic Systems
Grades 3-5, page 169

There are not enough resources to satisfy all of the desires of all people, and so there has to be some way of deciding who gets what.

NSES Content Standard F 
Science in Personal and Social Perspectives: Types of resources
Grades K-4, page 140
The supply of many resources is limited. If used, resources can be extended through recycling and decreased use.