Which of the following pesticides was used to kill termites and treat wood between 1948 and 1988?
A) PCB B) Atrazine C) Lindane D) DDT E) Chlordane
E
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In 1950 the global infant mortality was ________ times higher than it is today
A) 1/2 B) 4 C) 10 D) 2 E) 1
The amount of CO2 in the atmosphere is higher now than any time in the last 800,000 years
Indicate whether the statement is true or false
Which of the Earth's layers has the greatest density?
A. Asthenosphere B. Mantle C. Core D. Crust E. Lithosphere
Nuclear power plants in use today rely on ________
A) fusion reactions to create a flow of electrons to generate electricity B) fusion reactions to directly generate electricity C) fusion reactions to generate heat to boil water to generate electricity D) fission reactions to generate heat to boil water to generate electricity E) fission reactions to directly generate electricity