What factor triggered (caused the start of) the December 1991 debris flows at Caraballeda, Venezuela?
A. Steep slopes
B. Excessive rains
C. Urban development
Answer: B
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One of the causes of depletion of the environment is human population growth
Indicate whether the statement is true or false
Which of the following is not a type of desert landform?
A) Reg B) Erg C) Gibber plain D) Hamada E) Uvula
What is the main technical difficulty in dealing with fusion reactions?
A. The amount of energy needed to overcome the electrical repulsion of the reactants is extremely high. B. The reactants are highly toxic and extremely radioactive. C. It isn't possible to artificially generate the conditions needed for fusion. D. The mass of the reactants is less than the mass of the products. E. none of the above
Air pollution can lead to water contamination via a process called atmospheric deposition.
Answer the following statement true (T) or false (F)