Which of the following is true about levees?
A) They are a reliable way to protect an area from flooding.
B) To be called a levee, a feature needs to be at least partly constructed by humans.
C) A levee can trap water on the floodplain after the flood has subsided.
D) None of these are correct.
C) A levee can trap water on the floodplain after the flood has subsided.
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Open ocean tides can be monitored and recorded from satellites.
Answer the following statement true (T) or false (F)
In the first stage (pre-industrial) of the demographic transition model, birth rates and death rates were high, and population growth was negligible
a. True b. False Indicate whether the statement is true or false
Because of the success of China's population control programs, ________.
a. there is a younger population in China today b. European nations have instituted similar programs c. African nations have instituted similar programs d. environmental problems in China have been virtually eliminated e. China's population growth rate is much lower than it was in the 1970s
Which of these pH values corresponds to the most acidic rain?
A. 5.2 B. 4.9 C. 6.1 D. 5.8 E. 4.6