The 2009 indie film Moon features Sam Rockwell as an employee (named Sam) of the fictional Lunar Industries, a mining corporation back on Earth.
Just wrapping a three-year solitary stint on the moon, Sam is charged with overseeing the automated harvesters which extract helium-3 from the lunar regolith. Canisters of the harvested helium-3 are then sent to Earth to be used to generate fusion energy.
Much of the film deals with Sam's growing personal crisis as he finds out a few unpleasant things about his employer. The movie's premise is technically science fiction, but the notion of mining the moon for valuable natural resources that are in short supply on Earth is closer to reality than you might think.
The Helium Incentive
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As Discovery News reports, thanks to a critical shortage last year, the price of the isotope helium-3 has skyrocketed from $150 per liter to $5,000 per liter.
Helium wasn't technically "discovered" on Earth until about 1895, despite being abundant in the universe. Almost all of the global supply of helium is located within 250 miles of Amarillo, Texas; it's distilled from accumulated natural gas and extracted during the refining process.