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Birmingham Alabama coal miners were unionized by the CIO in 1934 after strikes and resistance from both the industry and state government. 1937 photo by Arthur Rothstein.
Two young guys in a working uniform and protective helmets, sitting in a low tunnel. Workers of the mine. Miners
Miner working a jackhammer in a coal mine. Work in a coal mine. Portrait of a miner. Copy space.
Amazing cross section of Green Agate Crystal cut isolated on white background. Natural translucent agate crystal surface, Green abstract structure slice mineral stone macro closeup
20 minerals: microelements and macro elements, useful for human health. Fundamentals of healthy eating and healthy lifestyles.

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