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| Ortleb, Edward P. | 1 |
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| Guides - Classroom - Teacher | 1 |
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Ortleb, Edward P.; And Others – 1990
The world is faced with a variety of environmental problems. No country has escaped pollution and resource depletion. Basic ecological principles are often ignored and sometimes this contributes to ecological disasters. This volume is designed to provide basic information about the quality of the earth's energy resources. The visual aids,…
Descriptors: Alternative Energy Sources, Conservation (Environment), Electricity, Elementary Education
