Oxygen is a critical component in any fire. However, it is generally not a limiting factor in natural fires because oxygen (O2) makes up ________% of Earth's atmosphere.
A. 21
B. 78
C. 98
D. 33
E. 3
Answer: A
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Mass movement can play a role in which of the following environments?
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The United Nations unanimously adopted a resolution entitled "Transforming Our World," which set an ambitious 17 goals to attain by ________
A) 2020 B) 2030 C) 2040 D) 2050 E) 2060