Fable for tomorrow

This town does not actually exist, but it might easily have a thousand counterparts in America or elsewhere in the world. I know of no community that has experienced all the misfortunes I describe. Yet every one of these disasters has actually happened somewhere, and many real communities have already suffered a substantial number of them. A grim specter has crept upon us almost unnoticed, and this imagined tragedy may easily become a stark reality we all shall know. ..

IS this paragraph logos

No.

should be ETHOS

IN Rachel carson essay FABLE FOR TOMORROW she used only the pathos and ethos

Right?

Doesn't this fable appeal to the emotions?

It hasn't convinced me either by its sound arguments nor by the expertise of the author.

Now you identify the author, which could give it credence as an ethos argument. However, without knowing the author, pathos is what stands out.

http://courses.durhamtech.edu/perkins/aris.html

so you said arguments is logos

Yes, this paragraph can be considered as logos. Logos is a rhetorical appeal that uses logic, facts, and reasoning to support an argument or claim. In this paragraph, the author is presenting factual information and logical reasoning to support their statement. They explain that while the specific town mentioned in the passage may not exist, similar situations have occurred in real communities. By providing this information, the author appeals to the audience's sense of logic and reason to convey the seriousness of the issue being discussed.