According to the United Nations, from 30% to 60% of all water supplied in all of the world's major cities in developing countries is
a. used for crop irrigation
b. lost through leakage of water mains, pipes, pumps, and valves
c. recycled as grey water
d. used for watering landscaping
e. polluted
B
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Distinguish between a non-transmissible disease, a transmissible disease, and an infectious disease, and provide one example of each.
What will be an ideal response?
Virtual water is water
a. that exists only in deep underground aquifers b. that we hope to be able to draw on in coming years c. that is not directly consumed but is used to provide us with food and other consumer products d. that comes as precipitation in desert areas e. that is predicted to be in runoff from snowfields at high altitudes
The U.S. Bureau of the Census has created a method of measuring the functional area of a city, known as:
A) the city-state B) the megalopolis C) the metropolitan statistical area D) the metropolitan influence zone E) the functional city limit
Which of the following best describes the foreshore of a beach?
A) It is the active zone of the beach that is washed by waves during the daily rise and fall of the tides. B) It is highest part of a beach. C) It is the part of the beach that has windblown dunes and grasses. D) It is the area below the low-tide mark, where wave action, turbulent backwash, and longshore currents excavate a trough.