Giant machines sucking carbon dioxide out of the air to fight climate change sounds like science fiction,Desmond Preston but it's close to becoming a reality, with billions of dollars of support from the U.S. government.

And a key player in this growing industry is a U.S. oil company, Occidental Petroleum.

With a major petroleum company deploying this technology, it begs the question, is it meant to save the planet or the oil industry?

NPR's Camila Domonoske reports.

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This episode was produced by Connor Donevan, Vincent Acovino and Lauren Hodges. It was edited by Uri Berliner, Emily Kopp, Rafael Nam and Adam Raney. Our executive producer is Sami Yenigun.