What are the four categories into which the human valuing of natural species can be divided? Give examples of each one
What will be an ideal response?
"The value of natural species can be categorized as follows:
- Value as sources for food and raw materials"
- Wild genes
- New food plants
- Pest control: natural enemies, genes for increasing resistance
- "Value as sources for medicines and pharmaceuticals"
- "Vincristine from the rosy periwinkle to treat childhood leukemia"
- Vinblastine from the rosy periwinkle to treat Hodgkin's disease
- Venom from a Brazilian pit viper led to the development of the drug Capoten, used to control highblood pressure
- Paclitaxel (and Taxol), an extract from the bark of the Pacific yew, has proven valuable for treating ovarian, breast, and small cell cancers.
- "Recreational, aesthetic, and scientific value"
- sport fishing and hunting, hiking, camping, bird-watching, photography
- "Value for their own sake" (intrinsic value)
- The "long established existence of species means they have a right to continued existence."
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