Boiling Point

Well, it took long enough. We finally realized that smog didn’t stop at some city limits line … that burning the family trash in the backyard incinerator wasn’t a good idea … and California started putting muscle into getting the air clean. Governor Ronald Reagan made the Caltech “father of smog” the head of the new state air resources board, TV stations began reporting smog alerts along with weather forecasts, and one stubborn LA county supervisor started his ten-year letter-writing crusade scolding the Big Four automakers about cleaner-burning engines. And a Louisiana gal named Seraphine was tooling around smoggy LA in her Triumph convertible and gas mask. Spoiler: she still lives here.

Living with smog was like living with an obnoxious neighbor. Angelenos tried protesting at city hall. They kept their coughing kids inside. A couple of actors manufactured joke cans of “genuine smog” and sold them to tourists. A few came up with earnest but crackpot solutions, like drilling a smog tunnel in the mountains. But serious pollution cost us serious money. Hollywood shoots had to shut down or move farther out of town to avoid it. And Southern California’s billion-dollar agriculture industry was being literally killed off by smog. One story we tell – of the Kaiser Steel plant in Fontana – made it look like LA had to choose between good jobs and good air, between pink slips and pink lungs.

By the late 1940's, Los Angeles had experienced several extreme smog days -- or "gas attacks" as they were called back then. Everyone had their eyes on wartime factories that had sprung up and were shooting black plumes into the air, but someone had a feeling that the cause might be something else. Arie Haagen-Smit, a Dutch professor at Caltech who would later be deemed the "father of air pollution," was technically supposed to be studying the taste and smell of pineapples when he first began to conduct research into smog. Through letters and interviews with Caltech faculty and historians, we piece together how Haagen-Smit discovered the recipe to smog, and how after he published his results, people weren't exactly ready to hear that their beloved cars were at the root of the problem. 

Don’t blame us – blame our geography! Modern LA earned its first smoggy nickname 450 years ago, as the “bay of smokes.”  At the La Brea tar pits, we take a short walk through a long history with curator Regan Dunn, who explains how and why the first Angelenos, 130 centuries ago, would have set fires that filled the broad bowl of LA and foretold the curse of smog. Fast forward thousands of years to the early 1940s, and the renowned artist Helen Pashgian, who grew up in Altadena back when the light around LA – once so radiant and cool – was slowly smothered by the blight from wartime industries that hurt her schoolgirl lungs and blotted out the once-glorious vistas.

For decades, the city’s air was so thick and gross with smog that it hid the mountains from view, shut down Hollywood film shoots and sent children home from school with burning lungs and stinging eyes. What was in the air and where was it coming from? No one knew for sure.L.A. Times Studios presents a special season of Boiling Point: Smoglandia. Hosted by longtime Los Angeles Times columnist Patt Morrison, Smoglandia is a narrative audio series tracing the rise, impact and eventual retreat of L.A.’s most insidious form of pollution: smog. Through interviews with scientists, policymakers, filmmakers and artists who lived through the worst days, Smoglandia explores how Los Angeles became a testing ground for environmental regulation, and how science and innovation transformed public health.At a moment when our hard-triumphs over smog face new setbacks, Smoglandia explores a landmark victory for the City of Angels, and, through clearer air, looks forward to the lessons we still have to learn — and the battles we have yet to fight.

Los Angeles Times journalist Susanne Rust shares her eye-opening experience documenting her daily interactions with plastic. Despite being an expert on the topic, she was stunned by the sheer volume of plastic in her life, from single-use items to everyday essentials. Susanne and Sammy also discuss the current state of plastic regulation in California, including a much-criticized decision by Gov. Gavin Newsom.

Bill McKibben is an acclaimed environmental activist and journalist, and the co-founder of 350.org. As spring training gets underway, Sammy and Bill discuss fossil fuel advertising at Dodger Stadium, and how oil and gas industry “sportswashing” is taking advantage of America’s national pastime.

Sammy Roth talks with Jason Rondou, an assistant general manager at the Los Angeles Department of Water and Power, about the city’s shift from coal to clean energy. Believe it or not, L.A. still operates a giant coal-fired power plant, more than 500 miles away in rural Utah. In November, DWP is finally closing it — and replacing it with a combination of gas and green hydrogen.

Sammy Roth talks with Los Angeles Times environment reporter Hayley Smith about the Trump administration’s regulatory rollbacks, the misinformation driving them, and what they mean for the future of climate action.Project 2025 Tracker:https://www.project2025.observer/en Read Sammy’s latest column:https://www.latimes.com/environment/newsletter/2025-09-18/california-legislative-session-climate-issues

Sammy Roth talks with Matt Freedman, staff attorney at the Utility Reform Network, about what California lawmakers are doing to rein in soaring electricity costs, and why it’s crucial for the state’s climate goals.Read Sammy’s latest column:https://www.latimes.com/environment/newsletter/2025-09-18/california-legislative-session-climate-issues

Rabbi Jennie Rosenn started Dayenu to provide a much-needed space for the Jewish community to discuss and address climate change. Now, amid the Trump administration’s hostility to environmental regulations and climate solutions, Dayenu is bringing a new kind of urgency to the work ahead. Sammy sits down with Rabbi Rosenn to discuss the state of faith-based climate action and why we need groups like Dayenu now more than ever.

This week we’re sharing an episode of another L.A. Times Studios podcast, Rebuilding Los Angeles. Hosted by Kate Cagle, this episode discusses post-fires Los Angeles and what our city can do to live smarter in the face of climate-fueled fires. 

Los Angeles has long been famous for its smog — and while things are better today, the fight isn’t finished. Sammy Roth talks with L.A. Times columnist Patt Morrison about her new podcast on the city’s smog history, and what it will take to build a future with truly clean air.

Sammy Roth welcomes award-winning actor Hannah Einbinder to the show. You may know her for her role as Ava Daniels on HBO Max’s “Hacks.” Or maybe you’re familiar with her climate advocacy — including a new campaign for fossil fuel divestment in Hollywood. She and Sammy discuss the intersection between climate and creativity, and why she thinks mushrooms (the legal kind!) will save us all.

Environmental journalist Jonathan P. Thompson joins Sammy Roth to discuss the future of the Colorado River, the state of America’s public lands, and the myths surrounding the West’s natural resources.Read Sammy’s latest column about the Colorado River:https://www.latimes.com/environment/newsletter/2025-08-14/river-rafting-in-colorado-offers-climate-lessons-for-southern-california

The Colorado River is shrinking, and the stakes couldn’t be higher for California. Sammy Roth talks with JB Hamby, the state’s lead Colorado River negotiator, about his vision for one of the West’s most important — and most threatened — water sources.

Sammy Roth talks with a California solar industry leader and a conservation advocate about where big solar farms should go — and where they shouldn’t. They discuss wildlife habitat, the urgency of the climate crisis and how to build renewables without destroying nature.

In the first of a two-part series on “abundance,” Sammy Roth talks with L.A. Times housing reporter Liam Dillon about California’s controversial move to roll back environmental protections in hopes of building more homes, and what that means for climate change.

Sammy Roth talks with journalist Michael Grunwald about his new book, “We Are Eating the Earth,” which began as a story about food and became a story about land. They explore how agriculture — especially the way we raise livestock and grow crops — has become one of the biggest drivers of climate change. They also unpack realistic solutions, and think about what it means to love hamburgers and also want a livable planet.Order “We Are Eating the Earth” here:https://www.simonandschuster.com/books/We-Are-Eating-the-Earth/Michael-Grunwald/9781982160074

President Trump’s new budget law guts federal support for solar and wind power, while boosting fossil fuels. Sammy Roth talks with Princeton researcher Jesse Jenkins about how the “One Big Beautiful Bill” could increase climate pollution and make energy more expensive.Read Sammy’s recent column:https://www.latimes.com/environment/newsletter/2025-07-03/republican-budget-bill-would-slaughter-americas-cleanest-cheapest-energy