Rachel Carson's Silent Spring focused national attention on the
a. harmful effect of chemical pesticides
b. health hazards caused by air pollution
c. proper disposal of toxic wastes
d. problems of nuclear power plants
A
please check this
Of course A.
To check the correct answer, we can look up information about Rachel Carson's book Silent Spring. Silent Spring was published in 1962 and is widely credited with helping to launch the environmental movement in the United States. It specifically focused on the harmful effects of chemical pesticides.
Carson's book raised concerns about the widespread use of pesticides, particularly DDT, and its impact on the environment, wildlife, and human health. She argued that the uncontrolled use of chemical pesticides was leading to the decline of bird populations and threatening the balance of ecosystems.
Given this information, the correct answer is indeed a. Silent Spring focused national attention on the harmful effects of chemical pesticides.