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Short Wave

Is sewage the future of green aviation?

17 Jun 2026

Transcription

Transcript generated automatically by AI and may contain errors.

Chapter 1: What are the current challenges facing the aviation fuel industry?

0.031 - 14.548

This message comes from CBC. Discount Dave and the Fix is the true-ish story of a fake rock star, a real trial, and what it means to stop running, face yourself, and fight to heal. Listen now, wherever you get your podcasts.

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15.93 - 27.523 Emily Kwong

You're listening to Shortwave, from NPR. Hey Shortwavers, Regina Barber here. And Emily Kwong, and today we are taking to the skies on the wings of cooking oil.

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27.976 - 33.384

Well, today, Flight 100 is flying from London to New York on sustainable fuel.

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33.404 - 40.694 Regina Barber

Okay, that's Richard Branson. Yes. The co-founder of the Virgin Group. Was this the first flight run entirely on alternative jet fuel?

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40.855 - 61.704 Emily Kwong

Yes. Wow. Virgin Atlantic in 2023 operated a flight powered by biofuel and a synthetic alternative made from plant sugars. This flight was incredibly expensive, receiving up to one million British pounds from the UK government, all to prove a scientific point. that a plane can fully run on something other than jet fuel, which, as you know, comes from fossil fuels.

61.724 - 66.39 Regina Barber

I love this, because what's getting us into the air now, it's not great for a planet. No.

67.091 - 84.713 Emily Kwong

At any given moment, there are thousands of planes in the air, and jet fuel is the only thing energy-dense enough and cheap enough to keep that industry aloft. But the war in Iran has put a damper on those economics. Ryan Spies, the managing director of sustainability for Alaska Airlines, is definitely feeling the pinch.

84.845 - 92.681 Ezra Klein

We were on track for a really, really great year and fuel prices have, you know, put us back hundreds of millions of dollars.

Chapter 2: How is sustainable aviation fuel (SAF) produced?

92.901 - 103.242 Regina Barber

Right. The Strait of Hormuz has been effectively closed for months. So some airlines are running low on fuel. Ticket prices have gone up. This has already affected my travel this year. I've cut back.

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103.222 - 116.859 Emily Kwong

Oh, really? Yeah. Well, honestly, that is an airline company's worst nightmare. They need our butts in those seats to meet their bottom line. So in a strange way, this global crisis has kicked down the door for a new kind of conversation about alternatives to jet fuel.

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117.159 - 126.33 Emily Kwong

And someone who pointed this out to me is Annie Petsonk, the former assistant secretary of transportation for aviation and international affairs under the Biden administration.

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126.931 - 145.362 Annie Petsonk

Because of the Iran war fuel price shocks, A number of airlines and a number of policymakers are starting to see alternative fuel as a national security matter. We can produce our own fuel here in the United States and not be dependent on foreign oil producers.

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146.489 - 156.711 Emily Kwong

Today on the show, greener flights. We explore a bunch of alternatives to jet fuel. Their chemistry, their cost, and what it would actually take to decarbonize the aviation industry for good.

157.293 - 165.19 Regina Barber

I'm Emily Kwong. And I'm Regina Barber, and you're listening to Shortwave, the science podcast from NPR.

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This message comes from Wise, the smart way to manage your money around the world. With Wise, you can send, spend, and receive money in over 40 currencies at the mid-market rate. Learn more at wise.com. T's and C's apply. This is our glass. On This American Life, one thing we like is a good mystery. Sometimes about really big things, but most times, the little mysteries are the best.

193.807 - 198.921 Ezra Klein

Our Lost and Found is currently filled with pants. I don't know, I've never seen this happen.

199.383 - 200.024 Alexis Christophorus

Wait, this is true?

Chapter 3: What is the role of cooking oil in sustainable aviation fuel?

752.877 - 763.94 Christina Kasotis

It's the same energy we bring to making sure that no matter how much snow is falling, those runways stay open. there's a real need for airports to be resilient. And I feel like let's, let's just go.

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763.96 - 771.089 Regina Barber

I mean, they did make this micro grid happen, right? So maybe they could make a breakthrough with SAF too. Someone's got to do it.

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771.549 - 779.139 Emily Kwong

And maybe it will be Washington, maybe Pennsylvania. We're in a race. We probably should race for this. The planet may be counting on us.

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779.94 - 793.166 Regina Barber

Emily Kwong, my shortwave co-host. Thank you so much for reporting. Oh my gosh. Thank you so much, Gina. This was really fun. This episode was produced by Hannah Chin. It was edited by Brent Bachman and our showrunner, Rebecca Ramirez.

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793.386 - 800.885 Emily Kwong

Special thanks to Daniel Offman, Sarah Robbins, and Julia Simon. Tyler Jones checked the facts. Kweisi Lee was the audio engineer. I'm Emily Kwong.

801.366 - 805.275 Regina Barber

And I'm Regina Barber. Thank you for listening to Shortwave from NPR.

812.95 - 834.267 Alexis Christophorus

Every episode of It's Been a Minute, NPR's What's Happening in Culture podcast starts by asking three questions. Who? How? Why now? If the culture's asking it, we're talking about it. At NPR, we stand for your right to be curious and indulge your cultural curiosity. Follow It's Been a Minute wherever you get your podcasts, and we'll break down the zeitgeisty topics that are filling your feed.

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