Prevention of loss or waste -- Dark organic matter in soil 2. Coconut -- Cultivation in alternate strips 3. Strip farming -- Base for life 4. Land resources -- saline sandy soil 5. Humus -- Conservation (match the following)
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The men wear oxygen helmets so that they do not introduce modern germs into the ancient air. When the men visit the past with Time Safari, Inc., they have to be very careful not to affect the environment in any way.
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