The Earth: Resources In The Crust (1960)

Surveys the major useful organic and mineral substances that are found in the earth's crust. Classifies the resources as the metallic minerals, the non-metallic minerals, and the mineral fuels, and shows how some of them are extracted and processed. Emphasizes ways in which these resources are utilized by man, and explains the steps necessary to conserve these irreplaceable resources. This film has been posted with permission by the copyright holder, Phoenix Learning Group. To use this footage from this film in your project, please contact us at footage@avgeeks.