"The new chemicals come from our laboratories in an endless stream; almost five hundred annually find their way into actual use in the United States alone. . . . Five hundred new chemicals to which the bodies of men and animals are required somehow to adapt each year, chemicals totally outside the limits of biologic experience."
–Silent Spring,
Rachel Carlson, 1962
What is the main idea of the excerpt?
A. The writer is concerned about the impact of chemicals on humans and animals.
B. The writer is concerned about the future of America’s water quality.
C. The writer is concerned about the future of America’s air quality.
D. The writer is concerned about the impact of litter on the waterways.
Answers: 3
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