Rachel Carson's Silent Spring
A) focused on the negative effects of chemical fertilizers.
B) led to the banning of DDT and other harmful chemicals in the United States.
C) led to international rules prohibiting the use of harmful pesticides in developing countries.
D) did major damage to the environmental movement in the United States.
Answer: B
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Carcinogens cause
a. genetic defects b. birth defects c. Cancer d. chronic health effects e. allergic reactions
What are the potential limiting factors for primary productivity?
a. light and nutrients b. light and carbon dioxide c. nutrients and carbon dioxide d. carbon dioxide and water e. nutrients and water
The oldest grain of sand found and dated is made of
A) zircon. B) diamond. C) peridotite. D) basalt.
Most of the population of Canada lives in what part of the country?
A) In Western Canada B) In Eastern Canada C) Within 150 miles of a coast D) Within 150 miles of the U.S. — Canada border