Some Analysts Suggest We Can Increase Supplies of Some Minerals

Multiple Choice

Some analysts suggest we can increase supplies of some minerals by extracting lower grades of ore. Which of the following is not a factor that limits the mining of lower- grade ores?

A) increased cost of mining and processing the larger volumes of ore
B) increasing shortage of freshwater needed to mine and process ore
C) the lack of new earth-moving equipment and mining techniques
D) environmental impact of increased land disruption
E) the pollution produced during the mining and processing of ore