Explains how nature produces topsoil from the basic raw materials of rock, water, air, and sunlight. Emphasize the necessity for an organized conservation program to save our natural resources. Includes animated drawings. For junior and senior high school grades and adult groups.

We digitized and uploaded this film from the Prelinger Archives. Email us at footage@avgeeks.com if you have questions about the footage and are interested in using it in your project. Buy this film on DVD.

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