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By Joe Belanger
A coalminer holds out a large chunk of energy rich coal in a dark coalmine.
Stock photo ID: 104737823
Signed model release on file with Shutterstock, Inc.
adult black chunk coal coalminer dark dirt dirty discovery energy fingers fossil fuel geology grime grunge hand hardhat helmet holding industry job men miner mineral mineworker mining occupation petroleum piece power protection safety showing soot source stone toughness underground unhygienic worker working