Coal Crossword

a non renewable resource
beginning of the large scale use of coal
coals main purpose today
a type of mining where they use parallel trenches to extract coal
surface mining technique that leaves an open area behind because the leftover earth is put somewhere else
most common type of mining
type of mining that leaves "steps" behind
an excavating machine used for mining coal that has a bucket attached by cables and operates by being drawn toward the machine
a tool or device used for removing unwanted matter from coal deposits
a piece of machinery hung from a boom of a mining or loading machine that moves coal from the machine to a receiving bin
metal rods inserted into the roof of a mine to prevent it from collapsing
there is none of this when using coal compared to wind or solar power
coal is this type of resource because there is limited availability of it
mining for coal can leave back environmental...
these are used in mining to break open rock to either extract it or to collapse the mine