Question

fossil fuels are usually found below ground, and humans use a variety of methods to extract them. which of the following extraction methods are commonly used to remove coal from the earth? choose 2 answers: a subsurface mining b hydraulic fracturing c mountaintop removal d vertical drilling

Explanation:

• Option A (subsurface mining): Subsurface mining is a common method used to extract coal that is located deep underground. Miners access the coal seams through tunnels and shafts.
• Option C (mountaintop removal): Mountaintop removal is a form of surface mining specifically used for coal extraction, especially in areas where coal seams are near the surface in mountainous regions. The top of the mountain is removed to access the coal.
• Option B (hydraulic fracturing): Hydraulic fracturing (fracking) is mainly used for extracting natural gas and oil from shale rock, not coal.
• Option D (vertical drilling): Vertical drilling is typically used for extracting oil and gas, not coal.

Answer:

A. subsurface mining, C. mountaintop removal