The Brief

Gross black dust on your windowsill. Sickly yellow haze that obscures the mountains. Childhood memories of recess cancelled due to smog alerts.

You know the air here is dirty. Now learn why.

Once Upon A Time

The L.A. smog story goes a little like this: on July 8, 1943, a mysterious haze descended on the city.

"People were having car accidents," Chip Jacobs, co-author of Smogtown: The Lung-Burning History of Pollution in Los Angeles, told LAist. "Mothers were wondering why their kids' eyes were watering. Police officers were spinning loopy."

What was this strange haze? Was it a gas attack? Smoke from factories? From some distant fire?

To solve the mystery, local officials formed the nation's first air quality regulator, the Los Angeles County Air Pollution Control District. They began looking into the problem and quickly learned that there were a lot of sources of air pollution in greater L.A.: people burning trash in their backyards, oil refineries, smudge pots (which are small, smoky fires used by citrus growers to keep trees warm at night), and factories.

But soon, a Caltech scientist figured out that cars and gasoline were largely to blame for the eye-watering, lung-searing haze.

A smog-shrouded view of downtown Los Angeles on October 7, 1968.

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What Do Cars Have To Do With It?

Car exhaust has two main components: hydrocarbons, from the gasoline, and nitrogen oxides, which are formed inside hot, internal combustion engines. Both are harmful in and of themselves, but when they float into the sunny, Southern California air, the sunlight bakes them into a new chemical: ozone, also known as smog.

Once scientists figured out what caused smog, the crackdown began: in 1967, a new state air quality agency, the Air Resources Board, was formed. It enacted tailpipe emissions standards for cars. It required catalytic converters on new models, cleaner gasoline and, at the gas pump, those little rubber boots that trap fumes from the nozzle. In 1984, smog checks began statewide. Other industries had to clean up, too: oil refineries, cement plants, power plants. And as California cleaned up its air, other states and the federal government followed.

L.A. has the worst ozone, or smog, in the country, according to the American Lung Association's 2021 State of the Air Report.

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Bad Now Vs. Bad Then

The air is a lot cleaner now. In 2020 , we had 157 days of unhealthy air, compared to well over 200 in the late 1980s. However, 2020 tracked the highest number of unhealthy air days since 1997, even with pandemic restrictions seeing a drop in auto travel. So when it's smoggy, it's not as smoggy as it used to be.

But Los Angeles still has the worst smog in the country, according to the American Lung Association's 2021 State of the Air report. (Again, scientists call smog "ozone." But they're the same thing).

Greater L.A. exceeded federal air quality standards for 157 days in 2020.

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Part of the problem is that it's been hot, incredibly hot. And heat speeds up the process of ozone-formation. Experts are trying to figure out whether the spate of bad air is a new trend, reversing years of steady progress.

"Is this weather, or has this become climate?" said Atwood. "We're grappling with that question basically."

What Makes Our Smog So Special?

Three reasons.

• One, there are a lot of us, and we own a lot of cars. Angelenos own 0.54 vehicles per person, compared to 0.43 in New York City. Also, we have the busiest ports in the country, which means tens of thousands of heavy-duty diesel trucks are on our roads, and they are way dirtier than cars.
• Two, the mountains that ring the L.A. Basin trap that pollution as it gets pushed eastwards by sea breezes.
• And three, our climate. Nearly three out of four days in L.A. are sunny. And the L.A. Basin frequently experiences a weather pattern where a layer of warm air will sit on top of a layer of cooler air and prevent it from dispersing. That traps pollution closer to the ground. Think of it like putting a lid on a pot.

Where's The Dirtiest Air? Where's The Cleanest?

Because the wind blows smog east, towards the mountains, the air is worst there. So places like Redlands, San Bernardino and even the tiny, mountain community of Crestline have far worse air quality than coastal cities like Long Beach or Santa Monica.

But there's another factor to consider besides smog: the raw vehicle emissions that combine to make smog can also have localized health impacts. So if you live within 500 feet of a busy road or a freeway, you're in a pollution hot spot, because that's where vehicle emissions are the most concentrated. (Use this handy map made by our friends at the LA Times to figure out how close you live to a freeway.)

Trucks on the SR 60 Freeway drive by Anna Gallegos' backyard in Mira Loma Village, California.

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In the very worst places to live, like near a freeway in San Bernardino, you will be exposed to both smog and raw vehicle emissions, said Ed Avol, the head of the Environmental Health Division at the USC Keck School of Medicine.

"It's sort of like a double whammy, so you get both the local impact of being near a roadway, and you also get the accrued accumulation of pollution that's become a regional issue," he said in an interview with KPCC/LAist in April.

What Will Breathing Dirty Air Do To Me?

When you breathe in dirty air, it triggers an inflammatory response in your body. And once that happens, a lot of bad things can happen. In the short term, air pollution can cause:

• Difficulty breathing and chest pain.
• Increased rates of asthma.
• Respiratory diseases like bronchitis and pneumonia.
• Lost school or work days.
• Doctor and hospital visits.
  

Over the long term, it's much worse. Kids who grow up breathing dirty air, whether it's from living near a freeway or in a smoggy area, or both, have weaker lungs that don't work as well.

"If they never get that maximum lung growth early in life, it looks like it's permanently lost," Avol said.

For older adults, air pollution can contribute to cognitive decline, memory loss and premature death. It can also exacerbate heart disease, diabetes, obesity and cause cancer. There's even research suggesting fetuses are harmed when their moms breathe dirty air.

"In a cynical, joking way, you could say we believe air pollution causes everything," Avol said.

Smog-making cars on March 22, 2006 in L.A.

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How Can I Protect Myself And My Family From Bad Air?

One of the most common ways people are exposed to pollution is while driving. So when you're on the freeway, be sure to keep your windows rolled up and re-circulate the air, instead of drawing it in from the outside. Changing your air filter also helps. And new cars are more tightly sealed than older cars, keeping pollution out.

If you can, try to live at least 500 away from a freeway or busy road. If you can't, using HEPA air filters has been shown to significantly reduce indoor air pollution when the air outside is dirty. Clean that black dust, which is a combination of diesel soot and rubber dust from tire wear, off your window sills.

Outside of the home, try to walk or bike on less busy streets, to limit your exposure to vehicle exhaust. When waiting for the bus, stand back from the street corner, where pollution levels soar when vehicles accelerate from a stop. And don't exercise near busy roads during rush hour, especially in the morning, or when the air is especially bad.

You can also check the air quality every day. This South Coast Air Quality Management District map will give you a good overview of air in your area. You can also check the Purple Air network, which measures particulate matter (like soot, dust and wildfire smoke), or have a low-cost air monitor installed at your home or work.

What Do We Need To Do To Make The Air Actually Clean?

It all comes down to transportation. Cars and trucks make up nearly 90 percent of the smog-forming pollution in Southern California (not to mention they are also the largest emitters of greenhouse gases in the state), and it's because they run on gasoline and diesel.

Switching to fuels with zero tailpipe emissions, like electricity and hydrogen fuel-cells, will make a huge difference, says Will Barrett, the clean air advocacy director for the American Lung Association.

Trucks drive along Interstate 80 on February 18, 2014 in Berkeley, California.

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"We need to see more focus and urgency on the conversion of the heavy duty sector to zero emission technology," he said.

But heavy duty trucks have proven tricky, so far, to electrify, because they would require a massive battery to power them over long distances while carrying heavy loads. Also, truckers would need frequent, convenient charging stations, and that infrastructure doesn't exist yet.

California regulators, ever the clean-air optimists, are throwing cash at the program. The ports of L.A. and Long Beach, for example, have a goal of shifting their entire fleet of largely diesel trucks and equipment to zero emissions technology by 2035 -- at a cost of $14 billion. If they can figure it out, all of our lungs will benefit.

This story is part of Elemental: Covering Sustainability, a multimedia collaboration between Cronkite News, Arizona PBS, KJZZ, KPCC, Rocky Mountain PBS and PBS SoCal.

The U.S. war with Iran has pushed inflation to its highest level in almost three years.

Consumer prices in April were up 3.8% from a year ago, according to a report Tuesday from the Labor Department. That was the biggest annual increase since May 2023.

Prices rose 0.6% between March and April.

From gas prices to housing, here are three things to know about the rising cost of living.

Gas prices are a big driver

Gasoline prices have jumped sharply since the war began, snarling tanker traffic in the Strait of Hormuz, a vital corridor for energy shipments. The average price of regular gas is $4.50 a gallon, according to AAA. That's up 38 cents from a month ago. The jump in energy prices accounted for 40% of the monthly increase in the consumer price index in April.

Rising fuel costs are affecting other prices as well

When energy costs jump sharply, it can have spillover effects. Air fares, for example, jumped 2.8% last month and are more than 20% higher than they were a year ago, as airlines struggle with a spike in jet fuel prices.

The cost of diesel fuel has risen by $1.88 a gallon since the war began. If that lasts, it could put upward pressure on the price of everything that's delivered by truck or train.

Excluding volatile food and energy costs, "core" inflation was 2.8% in April.

Housing prices also contributed to higher inflation in April

Housing costs were also a driver of inflation, jumping 0.6% between March and April, but some of that is a statistical fluke resulting from the six-week government shutdown last fall. Government number-crunchers were temporarily idled in October, so were unable to collect housing prices that month. That's had the effect of artificially lowering the measure of housing inflation. Tuesday's report provides a kind of catch-up.

Copyright 2026 NPR

The Los Angeles World Cup host committee has quietly posted its guidance on human rights after months of speculation over where the plan was and when it would be published.

Advocates had pushed the committee, an arm of the Los Angeles Sports & Entertainment Commission, to produce its plan. But now that it's out, they're not satisfied with what they're seeing.

The human rights guidance is required by FIFA and outlined on the host committee's website. It includes a list of online resources including where to file complaints with various local and state level agencies and a summary of local, state and federal laws protecting human and civil rights. The committee is also touting a partnership with L.A. County in which people can call 211 to report a concern during the tournament.

"Los Angeles is weeks away from hosting one of the largest sporting events in the world, and yet what has been posted is not a plan,” Stephanie Richard, director of the Sunita Jain Anti‑Trafficking Initiative at Loyola Law School, said in a statement. “It is a list of laws and hotline numbers."

The human rights document also skirts fears around ICE and its potential presence at the tournament and surrounding celebrations. Todd Lyons, the agency's head, said earlier this year that ICE's investigatory branch will play a key role in security for the tournament.

But ICE and immigration enforcement aren't mentioned on the host committee's web page on human rights or in its outline of its approach to human rights. "Immigration status" only gets a mention in the list of existing anti-discrimination laws.

"It certainly could have been much stronger," Angelica Salas, executive director of the Coalition for Humane Immigrant Rights in Los Angeles, said of the plan. She added that her organization participated in a roundtable on the plan, and she was disappointed ICE and recent immigration sweeps weren't mentioned in the resulting document.

"In order for all of this to happen, immigrant workers are part of it," she said of the World Cup. "Your hotel workers, your service workers, stadium workers, drivers." 

LAist reached out to spokespeople for the host committee for comment via email, phone and text, but did not hear back in time for publication. FIFA's press team also did not respond to an email from LAist.

According to the host committee's website, the human rights plan is the result of coordination with the city and county of Los Angeles, the city of Inglewood, and 14 roundtable discussions held in the fall of 2025.

"As a non-profit organization, the Host Committee’s role is primarily and necessarily focused on aligning and collaborating with governmental and non-governmental organizations," the document sums up the committee's approach.

The plan also promises more actions, including "Know Your Rights" training for L.A. residents and visitors and "Know Your Responsibilities" training for businesses and vendors. The committee also says it will develop a "rapid response" strategy to respond to potential problems at the tournament.

Available details on those plans were scant. And with the tournament just 30 days away, labor unions and community groups are continuing to voice concerns about potential ICE presence at SoFi Stadium and other potential consequences of the tournament coming to town.

In 2019, Xiaoman Ding was diagnosed with a pituitary tumor in her brain that caused her debilitating headaches. At times, she couldn’t open her eyes or walk.

So while she was detained at the Adelanto ICE Processing Center after being arrested at an immigration courthouse in Santa Ana last June, she made repeated requests for medical treatment. Instead of getting the normal medications she took to manage her symptoms, she said she received Tylenol and ibuprofen.

By July, her pain became so “unbearable” she told a nurse at the detention center she wanted to take her own life. The facility placed her in solitary confinement for three days for monitoring.

“I never told anyone that I experienced suicidal thoughts again,” she said in court documents that form part of a federal lawsuit filed in January by a private law firm and immigrant right' group seeking to improve conditions at the facility. “I was afraid that I would be put into solitary confinement.”

The case continues to make its way through the court system. The next hearing is scheduled for late May.

In declarations accompanying the lawsuit, detainees shared their experiences in isolation. Many of them said they were placed in solitary confinement after asking for things that are essential for their dignity — or to fight their case in court. Others said the confinement made them reluctant to ask for help in the future.

How detention centers isolate detainees

About 2,000 immigrants are currently being held at the ICE detention center in Adelanto. The site is run by The GEO Group, a private prison operator.

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Across the country, immigrant detention centers like Adelanto are holding more people in solitary confinement than under previous administrations — including President Donald Trump’s first term. Immigration and Customs Enforcement data also shows that detainees are being isolated for longer periods of time, and experts say solitary confinement can worsen the conditions of people who need support.

People in custody can be placed in “segregation,” as it is dubbed at these centers, for numerous reasons. These can include disciplinary issues, as well as claims by facility officials that the move is needed to protect detainees who could be harmed if left among the general population. People in detention can also be put in segregation if they are on suicide watch, if they’re experiencing a “serious mental or medical illness” or for staging a hunger strike.

Detainee advocates say isolation is also being used to punish immigrants in civil detention.

The “threshold to use solitary is often quite low and arbitrary,” said Katherine Peeler, an assistant pediatrics professor at Harvard Medical School and medical advisor with Physicians for Human Rights. The nonprofit publishes reports on solitary confinement at immigrant detention centers, rooted in public records, ICE data and testimony from detainees.

Some 2,000 immigrants are currently held at the Adelanto detention center, about 90 miles northeast of downtown L.A. in San Bernardino County. An LAist analysis of the most recent ICE data found that, ranked by percentage of the detainee population in segregation, this site is among the top 10 facilities in the United States.

How segregation can make medical issues worse

To get a sense of what immigrant detainees experience in segregation, Peeler asks the public to envision confinement.

“You are contained in a small cell, usually the size of a parking space,” she said. “Imagine being in a parking space and enclosing it all the way . . . You can't get out. You can't change the temperature.”

“The inability to control your environment, as well as the lack of contact with other humans, is known in medical literature to lead to great deals of anxiety, depression [and] extreme loneliness,” Peeler added. “People have been known to have hallucinations and agitation, [as well as] reduced cognitive functioning.”

The most recent Physicians for Human Rights report found that, between April 2024 and May 2025, ICE detention centers placed over 10,500 people in solitary confinement — often for more than 15 days. UN human rights experts consider solitary confinement placements that last that much or more to be torture, though the Supreme Court has held that isolation doesn’t violate the Constitution. ICE’s own policies call for “additional steps to ensure appropriate review and oversight of decisions to retain detainees in segregated housing for over 14 days.”

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At least four people have died after being held in custody at an ICE detention facility in Adelanto, California. A recent lawsuit alleges that living conditions there are inhumane, and some compare the facility to "concentration camps."

Rotten food, disease, isolation. What we know about conditions at the Adelanto ICE detention center

At least four people have died after being held in custody at an ICE detention facility in Adelanto, California. A recent lawsuit alleges that living conditions there are inhumane, and some compare the facility to "concentration camps."

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Disability Rights California, a federally mandated nonprofit that advocates for people with disabilities in the state, monitors conditions at immigrant detention centers.

Richard Diaz, a senior attorney at the nonprofit, was part of a team that conducted a site visit at Adelanto last summer. The team found a general lack of accommodations for people with disabilities. Diaz also spoke with a detainee who’d been placed in solitary confinement for over a month. “On top of that,” he told LAist, the detainee “had medical concerns and accommodation needs that weren't being met.”

Peeler noted that solitary confinement is also associated with sleep disruption, which “can lead to further mental health issues.”

Sleep disruption “is also really bad for one's stress response system,” she added. “You can have heightened levels of the stress hormone cortisol. This can lead to problems with hypertension or high blood pressure, and general underlying medical conditions being worsened.”

The federal government denies claims of substandard conditions at immigrant detention centers and declined LAist’s requests for interviews and comments. In statements issued after the recent deaths of detainees, ICE said it is “committed to ensuring that all those in custody reside in safe, secure and humane environments."

In a statement, a spokesperson for the GEO Group, a private prison operator that runs the Adelanto detention center, said: “[O]ur support services are monitored by ICE, including by on-site agency personnel, and other organizations within the Department of Homeland Security to ensure compliance with ICE’s detention standards and contract requirements regarding the treatment and services ICE detainees receive. In the event issues are identified, we quickly resolve all of ICE’s concerns.”

“The support services GEO provides include around-the-clock access to medical care, in-person and virtual legal and family visitation, general and legal library access, translation services, dietician-approved meals, religious and specialty diets, recreational amenities, and opportunities to practice their religious beliefs,” the spokesperson added.

What detainees have to say

People held at Adelanto paint a different picture.

LAist reviewed the detainee declarations filed as part of the January federal lawsuit seeking to improve conditions at the facility. Aside from people experiencing mental health crises and medical issues, multiple detainees at Adelanto described being placed in segregation as a form of punishment.

Andrei Karamychev is a Russian immigrant who came to the U.S. in 1999. In his testimony, Karamychev said that, after arriving at Adelanto last summer, he did not hear anything about his case for two months, “despite asking repeatedly to get information.”

“Many other people in my unit were also upset about not being told the reason for their detention,” he said. “We worked together to get attention to this issue by all yelling together, demanding to see our ICE officers.”

Eventually, Karamychev said, “a bunch of guards showed up and began to take out the people that spoke up, one by one.”

Six of the detainees involved were put in solitary confinement. After a few days in isolation, Karamychev said, “a lieutenant came in to meet with me and told me that I was going to spend two months in solitary because I had fought the officers.”

“This was a lie. I told him that I did not fight the officers, [that] I had just demanded nonviolently to see an ICE officer about my case,” Karamychev said. In response, the lieutenant told him: "We choose our truth."

Karamychev further detailed his confinement: “In solitary, I was under lockdown for about 23.5 hours a day. We had 30 minutes each day outside of our cells. During those thirty minutes, we could go outside for yard time in a cage that is about 10 feet by 10 feet, walk to the microwave to reheat meals, or look at a book.”

“When you are brought out to the mini yard, you are locked out there until the guards decide to let you back in,” he added. “The yard smells like urine because people had to pee out there, and it was not cleaned up. It is difficult because you want to have fresh air, but it smells like urine.”

Julius Omene Fredrick, an immigrant from Nigeria, was taken to Adelanto in January 2025. He has an ongoing application for a U visa, which is intended to give temporary immigration status to crime victims who have cooperated with law enforcement.

According to Fredrick, his unit had six showers for 80 people.

“There are three showers on each side of the room, with a walkway in the middle,” he said. “There are no privacy screens or curtains.”

Fredrick said he asked Adelanto guards for curtains “to give us some privacy.” Instead, he was placed in solitary confinement for seven days.

On another occasion, Fredrick said he was put in isolation for six days after complaining about the lack of access to the law library. Adelanto only allows four people from each 80-person unit to attend the library per day, he said. By Fredrick’s estimation, the library can fit “20 to 15 people.”

“We need access to the library so we can work on our immigration cases,” he explained. “Many of us do not have lawyers, so it is a real problem.”

Saddam Samaan Daoud Samaan, an immigrant from Jordan who had been living in Minnesota for nearly two decades before he was detained, said he was also put in solitary confinement after advocating for more access to the law library.

Throughout the detention center, Adelanto staff have put up posters about “voluntary departure,” Samaan added.

“The posters say that some people will be eligible for over $2,000 and a free flight if they choose to self-deport,” he said. “They even have sign-up sheets where you can write your name down to tell ICE you want to ‘voluntarily depart.’ I've seen them in the dayroom, the chow hall, and the solitary confinement unit. And it works. Being here breaks people.”

When detainees first arrive at Adelanto, they usually tell Samaan “they have support from their family and [and] plan to stick it out here as long as it takes.”

“Then, a month later,” he added, “they decide to sign away their case and leave the U.S. rather than stay at Adelanto any longer.”

The mayor of Arcadia has agreed to plead guilty to a charge she acted as an agent for China, federal prosecutors announced Monday. She has resigned from her position with the city.

Eileen Wang, 58, faces one count of acting as an illegal agent of a foreign government, according to the U.S. Attorney’s Office. The charge carries a potential sentence of up to 10 years in federal prison.

What we know about the criminal case

According to the U.S. Attorney’s Office, Wang and Yaoning “Mike” Sun of Chino Hills worked at the direction of the Chinese government and with individuals based in the U.S. to promote pro-People’s Republic of China propaganda in the United States. Those actions occurred between 2020 and 2022, prosecutors said.

According to federal prosecutors, Wang and Sun operated a website — known as U.S. News Center — billed as a news source for the local Chinese American community in Los Angeles County. They posted content on the site, described as "pre-written articles," based on directives from Chinese government officials.

Sun, 65, pleaded guilty in October 2025 in federal court to acting as an illegal agent of a foreign government. He is serving a four-year federal prison sentence.

Prosecutors also said Wang communicated with John Chen, whom they described as “a high-level member of the [Chinese government] intelligence apparatus,” in November 2021, and asked him to post an article from her website.

In a group chat, Wang referenced the article and wrote: “This is what the Ministry of Foreign Affairs wants to send,” according to the U.S. Attorney’s Office.

Chen pleaded guilty in New York to acting as an illegal agent of the People’s Republic of China and conspiracy to bribe a public official. In 2024, he was sentenced to 20 months in federal prison.

What's next

Wang, who was elected to the City Council in November 2022, was expected to make her first appearance in U.S. District Court Monday afternoon.

Citing a plea agreement, prosecutors said she's expected to enter the guilty plea within the next few weeks.

Arcadia's mayor is selected from the elected council members. A post on the city's website announced that Wang had resigned her position as of Monday and that a new mayor would be picked from the remaining council members at the next meeting.