Which of the following is a good example of a biological agent or action that is a hazard to public health?

A) Rotavirus infections lead to deadly diarrhea in more than a million children each year.
B) Chewing tobacco is known to greatly increase the chances of cancer of the mouth and throat.
C) For people living deep in a forest, the drought increased the chances of a deadly forest fire.
D) The use of air bags and safety belts has greatly reduced accidental deaths in moving vehicles.


A

Environmental & Atmospheric Sciences

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Of the following anthropogenic methane (CH4 ) sources, which is the largest?

A) livestock B) wastewater treatment C) agriculture associated fires D) rice paddies

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Total fertility rate (TFR) is the same as crude birth rate (CBR).

A. Yes B. No

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In general, the polar regions have low precipitation

Indicate whether the statement is true or false

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A meltdown of the reactor core would occur if

A. control rods were inserted into the core. B. too much coolant was lost. C. the proportion of uranium-238 was too high. D. the containment building developed an air leak. E. the containment shell was too thick.

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