Cultural eutrophication results from
A. Natural sediment and nutrient levels
B. Human activity
C. Natural topography
D. A change in animal life as well as plants
E. The disappearance of tributary streams
Answer: B
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Hydrolis involves
A) the chemical reaction of water. B) the addition of water with little chemical change. C) frost action. D) salt crystal growth from evaporation.
Simuum, sirocco, and haboobs are types of _______________
Fill in the blank(s) with correct word
Transportation problems have plagued the African region. Transportation is such a problem that it is often cheaper to ship food across the globe from the United States to Africa than to truck it across one African country
a. True b. False Indicate whether the statement is true or false
Above the permafrost layer, the _______________ layer freezes during winter but thaws during summer
Fill in the blank(s) with correct word