The primary source of mercury in the air is from emissions from coal-fired electric power plants. An EPA regulation that required a reduction of this pollution has resulted in which one of the following?
A. The supreme court ruled that the EPA had to consider the cost to power companies of complying with the ruling.
B. The supreme court ruled that the EPA rule was invalid.
C. Mercury pollution has increased.
D. There has been an increase in the number of coal-fired power plants being built.
Answer: A
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Rise and fall of sea level in epeiric seas can be partly explained by continental glacial events
a. True
b. FalseIn Las Vegas, Nevada, the groundwater supply is ________
A) being depleted B) increased C) not being used and staying the same D) being used and staying the same E) about to be tapped as soon as Lake Mead runs dry
Why might the following nuclear reaction not be very good for energy production in a fission reactor?
Fe ? 
Si + 
Mg + 3 neutrons
A. The mass of the by-products is too high, and therefore, the energy released will not be high enough. B. The material only produces a few neutrons so the chain reaction will not be very efficient. C. Interatomic attraction between the products will impede the separation of the atoms from the unstable nuclei. D. The products are not the right size to obtain much energy from the missing mass due to the strong nuclear force. E. The reactants are too small to obtain energy from the missing mass due to strong nuclear force.
What is true of the intertropical convergence zone?
A) It coincides with the geographical equator. B) It is the result of the convergence of a Hadley cell and Ferrel cell. C) It is subject to seasonal variations. D) It coincides with areas of strong winds.