Which of the following was not considered a primary candidate for resource extraction in Africa during the late nineteenth century?

Question

Quizplus · Accepted Answer

Aluminum was not considered a primary candidate for resource extraction in Africa during the late nineteenth century because the process for extracting aluminum from bauxite ore was not yet economically viable on a large scale until the Hall-Héroult process was developed in the late 1880s, and even then, it took time for aluminum to become widely used and extracted.

Which of the Following Was Not Considered a Primary Candidate