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| | FLORA OF NORTH AMERICA - Volume 1, Chapter 10 |
 | | In most of North America, a large proportion of the environment has been compromised by urbanization, extraction of commercial timber species from forests, plowing of prairies, grazing of rangelands, draining of wetlands, pollution, and related causes. |
 | | Plants native to North America that are listed by CITES include some or all members of the Agavaceae, Araliaceae, Cactaceae, Crassulaceae, Ericaceae, Orchidaceae, Portulaceae, Sarraceniaceae, and Zamiaceae, which are among those families in the region most prone to overcollection for horticultural or medicinal purposes and for international trade (D.S. Favre 1989). |
 | | Certainly North America is not unique in regard to the degradation of the natural environment and the loss of biological diversity. |
| hua.huh.harvard.edu /FNA/Volume/V01/Chapter10.shtml (8943 words) |
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