Earth's natural resources -- Nonrewable resources -- Renewable resources -- Conservation: what can you do?.
Summary:
"Food, paper, water, gas - everything we use in our daily lives started out as a natural resource. Some natural resources, such as sunlight, are limitless. However others, like oil, are running out fast!" -- Back cover.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.