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 decline of species will accelerate even more as the last forests are destroyed in forest strongholds like the Philippines and Ecuador. The author also mentions the loss of vast potential biological wealth, undeveloped medicines, crops, timber, and other products that will never come to light.
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