Recently, a listener wrote in with a question about OPEC and oil prices. She was prepping for a camping trip… thinking about how much it costs to fill up her diesel-guzzling camper van at the pump.  “It would be so awesome if you guys could do an episode explaining OPEC to us,” she emailed us. She wanted to know: why does OPEC exist? Why does it limit the supply of oil? And now that the United Arab Emirates has dropped out, what will happen to gas prices?   We love when our listeners write in (and send us voice notes!). The simplest questions can reveal how the complicated web of the economy works. On our latest: we answer our listener’s questions… and the questions behind those questions!  Related episodes: • Chevron, Venezuela and the Paradox of Plenty [https://www.npr.org/2026/01/16/nx-s1-5680400/chevron-venezuela-oil-industry-petrostate]   Book info. [https://www.planetmoneybook.com] / Subscribe to Planet Money+ [https://n.pr/3HlREPz] Listen free: Apple Podcasts [http://n.pr/PM-digital], Spotify [https://n.pr/3gTkQlR], the NPR app [https://n.pr/3Bkb17W] or anywhere you get podcasts. Facebook [https://n.pr/3h92GwS] / Instagram [https://n.pr/3FqLuws] / TikTok [https://n.pr/3sGZdrq] / Our weekly Newsletter [https://n.pr/3zrFvUB]. This episode of Planet Money was produced by James Sneed with help from Willa Rubin. It was edited by Marianne McCune, fact-checked by Sierra Juarez, and engineered by Robert Rodriguez. Alex Goldmark is our executive producer.  See pcm.adswizz.com [https://pcm.adswizz.com] for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences. NPR Privacy Policy [https://www.npr.org/about-npr/179878450/privacy-policy]