Crossword puzzle clue "miner's major problem"

Here are the possible solutions for miner's major problem clue

Answer
Clue
Relevancy
cavein
Clue
Miner's major problem
alcoa
Clue
Fortune 500 company that's a major miner
Company that's a major miner
ore
Clue
Major miner concern?
Definition
rock containing a valuable metal, also OWRE
crisis
Clue
Major problem
Definition
a crucial turning point
densefog
Clue
Major visibility problem for drivers
smog
Clue
Major visibility problem in Hong Kong
Air pollution that's a major problem in China

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