Species Loss -- Crisis or False Alarm?

> As with most environmental questions, not all experts agree about the threat to species diversity. Some observers believe that extensive damage to species diversity has not been proven and claim that, while wild habitats are disappearing because of human expansion, the seriousness of the extinction has been exaggerated and is unsupported by scientific evidence. They point to the fact that the total number of species and their geographic distribution are unknown. How, they ask, can forecasts be made based on such sketchy data?

Depletion and Conservation of Natural Resources - Biodiversity - Species, Endangered, Extinction, Treaty, Loss, and Human 

http://www.libraryindex.com/pages/1164/Depletion-Conservation-Natural-Resources-BIODIVERSITY.html#ixzz1AU9Vd22z

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