20 Celebrities Who’ve Made Millions of Dollars Outside of Hollywood

Kevin Costner paid $24 million to the US government to buy a company that separates oil and water.

In 1995, Costner bought Ocean Therapy Solutions from the US government. It develops water-purifying technology deployed during oil spills. During the Deepwater Horizon oil spill in 2010, BP made a $52 million order for the machines to help clean it up.

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