Shades of gray or green in iron-bearing rocks are caused by:
a. native iron
b. ferric iron
c. ferrous iron
d. oxidized iron
c
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a. wind direction b. rotational wind speed c. vertical wind speed d. diameter and height e. length of the path of damage
How is biotechnology helping to reduce the environmental impacts of mining?
A) through efficient treatment of mine wastes and contaminated water B) plant uptake of precious metals permits mining of plants rather than rock C) through the use of plants that revegetate mine waste piles D) through better environmental regulations relating to mine waste
What do most scholars agree is the most significant component of globalization?
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