Science
Smog in Phoenix and Salt Lake City? The E.P.A. Is Blaming Asia.
For decades, Phoenix has struggled with smog that gets trapped in its bowl-like topography and is detrimental to human health. In 2024, when the city failed to meet a federal air pollution standard, it risked being hit with stricter rules designed to force more aggressive pollution limits.
Then, President Trump returned to the White House. And now the Phoenix-Mesa region has gotten off the hook for an unusual reason: The Trump administration is blaming foreign countries for the pollution.
Without contaminants blowing in from Mexico and Asia, the reasoning goes, Phoenix would have been in compliance with federal pollution limits.
Other regions are now taking up that strategy. Last week, the Environmental Protection Agency accepted similar reasoning to propose that the area around Salt Lake City in Utah get a reprieve from stricter emissions rules governing vehicles, factories and power plants.
These places should not be penalized “due to foreign sources of emissions,” Lee Zeldin, the E.P.A. administrator, said on X. “Federal ozone air quality standards would have been met had it not been for emissions transported into the region from outside the U.S.”
Senator John Curtis, Republican of Utah, hailed the move. “For too long, Utah has faced the prospect of being penalized for air pollution we did not create and cannot control.
”The Utah Petroleum Association also lauded the E.P.A.’s moves. The oil and gas industry has been on the forefront of the move to shift the blame for smog away from local polluters and onto foreign countries.
Some environmental groups and experts say that argument is preposterous.
The Clean Air Act does allow regions to take account of cross-border emissions to avoid penalties for failing to meet federal air quality standards. But it was not meant for pollution from thousands of miles away, they say.
Moreover, accounting for emissions from elsewhere does not excuse local authorities from tackling local sources of pollution, said Abi Vijayan, a former E.P.A. lawyer who is now with the Natural Resources Defense Council, an environmental group.
“You can’t point to some pollution blowing in from thousands of miles away, when there’s a lot more to do to cut local pollution,” Ms. Vijayan said. “This is going to mean more heart attacks, more lung disease, more asthma for the residents of Phoenix.”
The idea that pollution crosses international boundaries isn’t scientifically controversial. Ozone, the main ingredient in smog, is produced when nitrogen oxide combines with volatile organic compounds and is heated by sunlight. It can indeed travel thousands of miles, for example, carried by westerly winds across the Pacific Ocean, or across the border from Mexico.
Phoenix and Utah officials say that explains why, over the last two decades, ozone levels have risen despite local efforts to reduce the pollutants that form the thick haze. Both Phoenix and Salt Lake City have long received “F” grades from the American Lung Association for high levels of ozone.
“We’d done a great job in reducing those local emissions, almost cut them in half, but ozone concentrations were starting to increase again,” said Matthew Poppen, director of environmental planning at the Maricopa Association of Governments, which put together the analysis for the Phoenix metropolitan area. “That got us asking, ‘Hey, what’s going on?’”
Local officials commissioned an analysis that found that pollution from overseas, carried in particular by atmospheric currents in the case of Asia and by summer winds from Mexico, contributed an average of about 15 parts per billion of ozone. That bumped up the area’s average above the 70 parts per billion federal limit. Wildfires, as well as pollution from other states, also had an effect, they said.
The Northern Wasatch Front region in Utah, which includes Salt Lake City, reached a similar conclusion.
“It’s allowed us to understand what we can control locally, what can be done to improve things, but also that we shouldn’t over‑regulate,” said Bryce Bird, air quality chief at the Utah Department of Environmental Quality.
“Other areas in the West are seeing the same thing that we are: added local reductions aren’t resulting in a reduction in ozone,” Mr. Bird said. “There’s something else that’s driving that.”
Some experts doubted the significance of the findings.
“We’ve always known some pollution comes from abroad,” said Daniel Cohan, an expert in atmospheric modeling at Rice University. Still, “the levels that they’re claiming are contributed internationally are not particularly high,” he said.
“There’s nothing really unusual in seeing that level of ozone getting attributed to emissions from other countries,” he said. “These standards are based on air quality levels needed to protect human health. If everyone can point to international sources as a reason why their air doesn’t need to be clean enough, then we’ve undermined the entire meaning of the standards.”
Normally, a failure to meet federal ozone standards would trigger a downgrade in what’s known as the area’s nonattainment status, bringing a wave of tougher environmental regulations, including stricter federal permitting rules and a mandate to conduct more aggressive vehicle emissions testing.
Local industry groups have rallied in support of the effort by Arizona and Utah, highlighting the region’s data center construction boom.
“Arizona is now a global hub for advanced manufacturing and is a highly desirable location for artificial intelligence and computing related industries,” Danny Seiden, president of the Arizona Chamber of Commerce and Industry, said in comments submitted to the E.P.A. in December.
Tougher pollution controls were “not just a regulatory burden for local industries, but also an economic and strategic threat,” he said.
The stakes were high for health too, said Dr. Brian Moench, president of Utah Physicians for a Healthy Environment, a nonprofit organization.
Ozone is a colorless, odorless gas that can harm the lungs, especially in children and older people, and can trigger a host of respiratory and cardiovascular diseases. “Ozone is so potent, it doesn’t take much at all to have a profound impact on people’s health,” Dr. Moench said.
He pointed to a large study that found that being exposed to an increase of just 3 parts per billion of ozone for a duration of 10 years caused a loss of lung function and lung tissue equivalent to what would typically occur from smoking a pack of cigarettes a day for 29 years.
“It doesn’t matter if the ozone came from China,” Dr. Moench said. “If you’re breathing it, it’s doing the same harm as if it came from Salt Lake City.”
Over the past two decades, several other regions had made similar arguments against stricter regulations, including Imperial County, Calif., and El Paso, Texas.
But previous administrations had largely been skeptical. The Biden administration set a high bar for considering such arguments, including proof that the area was already doing everything it reasonably could to reduce pollution domestically. The arguments also tended to come from regions closer to the border.
In March, Senator Mark Kelly, Democrat of Arizona, hosted Mr. Zeldin at an air quality round table of local officials and industry representatives. “A key topic of discussion was the need to modernize E.P.A. guidance and cut red tape for local governments and businesses,” Mr. Kelly later said in a news release.
The following month, during a trip to Utah, Mr. Zeldin announced that he would repeal the Biden administration’s strict guidance, saying he was removing “cumbersome red tape.”
Some researchers pointed out the irony of the United States, currently the second-biggest polluter on the planet, pointing its finger at other countries.
In fact, dirty air from the United States can and does travel abroad, just as the United States receives pollution from across the globe, said Yuhang Wang, a professor in atmospheric science at Georgia Tech.
“What’s blowing in,” he said, “is also blowing out.”
Science
Video: Southern Lights Seen From International Space Station
new video loaded: Southern Lights Seen From International Space Station
By Cynthia Silva
June 10, 2026
Science
UC Davis favored less qualified Black, Latino med school applicants, Justice Department claims
The U.S. Justice Department has accused the UC Davis School of Medicine of choosing race “over merit, skill, and competence” in its admissions process, favoring Black and Latino students even when they weren’t as qualified as white and Asian applicants.
The department said its findings, announced Wednesday afternoon, were based on a six-month investigation by its Civil Rights Division. The Justice Department said it found that the Northern California university violated the Supreme Court’s 2023 ruling against race-based determinations in admissions. The findings have been contested by the school.
“Davis Med’s actions reflect both unabashed contempt for the rule of law and plain disregard for the potential public health consequences of putting race over merit, skill, and competence,” Assistant Atty. Gen. Harmeet K. Dhillon of the Justice Department’s Civil Rights Division said in a statement.
“The Department will not allow schools to violate federal law without consequence.”
A spokesperson said the university was “disappointed” with the report and its findings.
“UC Davis School of Medicine strongly disagrees with any characterization of its admissions practices as discriminatory or inconsistent with applicable law,” a school statement read. “The report’s findings do not accurately reflect the school’s rigorous, individualized, and merit-based admissions process and our firm commitment to complying with applicable federal and state antidiscrimination laws.”
The department outlined its case in a 12-page letter to an attorney representing UC Davis, claiming the university violated Title VI of the Civil Rights Act, as interpreted by the Supreme Court’s 2023 Students for Fair Admissions vs. Harvard.
Title VI prohibits institutions receiving federal funding from discriminating based on race, while the 2023 decision banned affirmative action in higher-education admissions.
The Justice Department said its investigation found the medical school “adopted admissions practices with the express purpose of circumventing” the 2023 ruling.
That method was the “Davis Scale,” the department said. The letter called the scale a “continuous measure of socioeconomic disadvantage” that includes parental income and education, growing up in a medically underserved area and other socioeconomic variables.
The Justice Department included UC Davis literature that said the scale had allowed the school to triple the enrollment of Black and Latino students.
In 2024, Davis’ medical school became the third most racially diverse medical school in the country, the Justice Department claimed.
Conversely, the department said its review of medical school admissions data from 2023 to 2025 found that 93% of white and certain Asian applicants had MCAT scores at or above those of the average Black student.
It also showed that Black and Hispanic applicants were admitted at rates up to six times higher than whites and Asians, despite consistently having, on average, lower academic qualifications, according to the department.
The Justice Department said it is attempting to enter into a voluntary agreement with UC Davis to bring the medical school into compliance. The department would eventually sue the medical school if such a resolution is not found.
UC Davis did not indicate whether it would comply with the Justice Department.
“UC Davis is fully committed to meeting the critical healthcare needs of California, particularly those in underserved and under-resourced areas,” the school said in a statement.
The finding mirrors similar investigations into medical schools at UCLA and UC San Diego.
The Justice Department said last month that UCLA’s David Geffen School of Medicine intentionally used race for the last three years to discriminate against white and Asian applicants during admissions.
Science
Why new dads shouldn’t panic about low testosterone
Three months after his son was born, Kevin Maguire felt alone.
It was 2019. He had recently moved to Barcelona with his wife and daughter and was working on marketing projects for Fortune 500 companies. The birth of his son, Bodhi, should have been a joyous event. But Maguire, now 43, became sad and irritable, and didn’t want to be around his newborn. He withdrew from family and friends, often playing video games late into the night or finding excuses to get out of the house.
“I would take the dog out for a walk,” Maguire said. “I wanted to get far away enough that I wouldn’t bump into anyone I knew and I would just sit and cry.”
Desperate for answers, he entered his symptoms online. Maguire, author of the recently published book “The New Fatherhood: Why Everything They Told You About Being a Dad Is Wrong, and How Embracing It Will Transform Your Life,” knew to look for signs of the “baby blues” in his wife. But he was surprised by articles that said men could experience postpartum depression too. The diagnosis resonated and he began writing about his condition and the trials of fatherhood on Substack.
New dads face psychological pressures, from sleepless nights to sky-high bills, which can contribute to postpartum depression. So can shifting hormone levels.
“One thing I found in my lab’s research is that when new dads have really low levels of testosterone, they might report more symptoms of postpartum depression,” said Darby Saxbe, a professor of psychology at USC and author of the recently published “Dad Brain: The New Science of Fatherhood and How It Shapes Men’s Lives.”
While hormonal shifts can create challenges, they also help men adapt to fatherhood, Saxbe explained. Several hormones can spike in men when they become dads, including oxytocin, linked to better relationship quality; vasopressin, associated with emotional bonding; and prolactin, which promotes lactation in women and caregiving behavior in guys.
New dads can also experience a decline in testosterone. According to a 2011 paper from University of Notre Dame professor Lee Gettler, part of the largest study on fatherhood and testosterone ever conducted, men averaged around a 25% drop in testosterone after becoming fathers.
While dads have reasons to be concerned by plummeting levels of testosterone, a modest dip isn’t necessarily a disaster — in fact, it can make men better parents and partners.
“We often get invested in the idea that men should always have the highest possible levels of testosterone,” Saxbe said. “What the research tells us is a little more nuanced. You really want flexibility. You want a hormonal system that can adapt to the different demands of your life.”
The prospect of a decline might scare soon-to-be fathers, especially those on TikTok and Instagram, where accounts push the idea that having “high T” is the key to being a “real man,” according to a recent study in the journal Social Science & Medicine.
Influencers stand to profit persuading men there’s a widespread “masculinity crisis,” the researchers found, noting that 72% of the accounts they analyzed had a stake in testosterone supplements and treatments.
But studies show more testosterone isn’t always better. “We found that when dads have higher testosterone, even before birth, they’re less invested [than men with lower testosterone] in co-parenting a few months after birth,” Saxbe said. High T fathers were more stressed from parenting than their lower T counterparts, and had partners who were less satisfied in their romantic relationships.
This jibes with the challenge hypothesis, which says, in multiple species, testosterone levels rise when males battle for attention from potential mates and go down when it’s time to take care of the young.
While a small decline can be adaptive, dads face mental health risks when their testosterone drops too low.
There is no “normal” level of testosterone, said Dr. Jesse Mills, director of the Men’s Clinic at UCLA Health. Experts recommend that men should consider treatment if their levels dip below 300 nanograms per deciliter (ng/dL). But men metabolize testosterone in different ways, meaning a healthy level for one might be low for another.
“If a new dad comes to me and his testosterone is 298 [ng/dL], he’s below the threshold,” Mills said. “But if he has zero symptoms and everything else is going great — he’s over the moon with his new child, he’s so happy — that’s not somebody I’m going to treat with testosterone.”
He notes that the drop in testosterone fathers experience can partly be attributed to the stresses that come with a new kid: less sleep, a poor diet and fewer trips to the gym. That means there are precautions that expectant fathers can take that don’t involve testosterone replacement therapy (TRT).
Still, while some guys with low testosterone levels might not need TRT, others in the “normal” range could benefit from treatment. (Dads who want another kid soon, beware. Mills notes that testosterone replacement therapy can take a man’s sperm count to zero.)
Both Mills and Saxbe stress that men should be paying attention to symptoms of low testosterone — such as depression and low libido — rather than trying to reach or maintain an ideal number. They also agree that tending to mental health concerns is hugely important for new fathers.
Eventually, after Maguire researched his condition, he recovered after time spent meditating, exercising and bonding with his son.
“A lot of new dads don’t realize how much they’re struggling because they feel ashamed or because they don’t realize it’s common shortly after the birth of a baby,” Saxbe said.
When they struggle, fathers can fixate on testosterone because that’s what modern culture tells them will make them feel better. And sometimes testosterone replacement therapy works. But Saxbe stresses a lot of men could use psychotherapy or support groups that bring dads together, as well as more time bonding with loved ones in general.
“The thing that predicts a man’s well-being and longevity is the quality of his relationships with other people,” said Saxbe. “You can be the world’s best weightlifter. You can have a low body-fat percentage. You can be killing it at work. Those things don’t predict how happy you’re going to be at 80.”
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