Final answer:
The loss of plant species and habitats will devastate animals and hinder human progress.
Step-by-step explanation:
The author's beliefs about the disappearing species can be summarized as follows: the loss of plant species and habitats will devastate animals and hinder human progress. According to the excerpt, the author mentions that as forests are destroyed, the decline of species will accelerate, leading to extinction rates that are already higher than before the coming of man. The author also highlights that the loss of species will result in the destruction of vast potential biological wealth and the loss of new sources of scientific information.
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