Is my Old Oil Stock worth Anything? - American Oil & .
AOGHS serves as a resource for petroleum history for researchers, teachers, students, historians and the public. U.S. exploration and production industry's heritage of social, economic and technological achievements provide a context for teaching the modern energy business.
Coal mining - IPFS
The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron .