The people least vulnerable to air pollution are
a. infants
b. elderly people
c. adult males
d. people with heart and respiratory disease
e. pregnant women
C
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A heavy ball hangs by a string, with a second string attached to its bottom (Figure 2.7 in your textbook). A quick pull on the bottom string breaks the
A. bottom string. B. top or bottom string equally likely. C. top string. D. none of the above
Oxygen levels are lowest in what section in the diagram?
A. A B. B C. C D. D E. E
Solar thermal systems used to generate electricity are the best option for energy generation in desert areas as there are no environmental impacts.
Answer the following statement true (T) or false (F)
In some countries of the world, food supplies are insufficient to provide the entire population with a nutritious diet
Indicate whether the statement is true or false.