The habitable planet. Unit 9, Biodiversity decline /
Living species on Earth may number anywhere from 5 million to 50 million or more. Although we have yet to identify and describe most of these life forms, we know that many are endangered today by development, pollution, over-harvesting, and other threats. Earth has experienced mass extinctions in th...
| Other Authors: | , |
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| Format: | Video |
| Language: | English |
| Language Notes: | In English. |
| Published: |
District of Columbia :
Annenberg Learner,
2007.
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| Series: | Academic Video Online
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| Subjects: | |
| Online Access: | Connect to this streaming video (Alexander Street Press) |
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