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
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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.
Total fertility rate (TFR) is the same as crude birth rate (CBR).
A. Yes B. No
Of the following anthropogenic methane (CH4 ) sources, which is the largest?
A) livestock B) wastewater treatment C) agriculture associated fires D) rice paddies
In general, the polar regions have low precipitation
Indicate whether the statement is true or false