Final answer:
The author believes that 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. The excerpt mentions that the decline of species will accelerate as forests are destroyed, and that if efforts are not made to save them, more species of plants and animals could vanish or face early extinction. The author also emphasizes the importance of these species in providing scientific information, biological wealth, and various products and amenities.
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