The Air We Breathe: How Pollution Affects America’s Children and Communities

A Troubling Reality for Millions of Americans

Picture this: nearly half of America’s kids waking up each day and simply breathing air that could harm their health. It sounds like something from a dystopian novel, but it’s our current reality. According to the American Lung Association’s latest State of the Air report, a staggering 152 million Americans—that’s about 44% of our entire population—are living in areas where the air quality falls below healthy standards. Among them are 33 million children and teenagers under 18 who are breathing polluted air every single day. This isn’t just an environmental issue relegated to news headlines; it’s a public health crisis affecting nearly half our nation, with our youngest and most vulnerable citizens bearing a disproportionate burden. The implications are sobering: millions of families across the country are dealing with an invisible threat that seeps into their homes, schools, and playgrounds, potentially affecting their children’s health for years to come.

Why Our Children Are Most at Risk

Kevin Stewart, who directs environmental health at the American Lung Association and helped author the report, explains why kids face greater dangers from air pollution than adults. It’s not just that they’re smaller or more delicate—though those factors matter. Children’s lungs are still developing, making them more susceptible to damage from pollutants. They also breathe more air relative to their body size compared to adults, meaning they take in higher concentrations of whatever’s in the atmosphere. Add to this the fact that kids typically spend more time outdoors playing, running around, and just being kids, and you have a perfect storm of vulnerability. The health consequences aren’t always immediate and dramatic like an asthma attack sending a child to the emergency room—though that certainly happens. The more insidious effects include the development of asthma in children who might never have had it otherwise, or a gradual reduction in lung function that follows them throughout their entire lives. These are children who may grow into adults with compromised respiratory systems simply because of where they happened to grow up. It’s a sobering reminder that our environment shapes our health in profound and lasting ways, particularly during those crucial developmental years.

The Pollution Picture: Mixed Signals Across America

The researchers behind the State of the Air report took a comprehensive approach, measuring both ozone pollution (commonly known as smog) and particle pollution (or soot) across different regions. They looked at both short-term spikes and long-term exposure levels, using data collected between 2022 and 2024 to paint a picture of America’s air quality. What they found was a mixed bag of progress and setbacks—a reminder that environmental health isn’t a straight line toward improvement. On the concerning side, nearly 4 million more Americans were breathing unhealthy levels of smog between 2022 and 2024 compared to the previous reporting period. That’s a significant backslide, representing millions of additional people exposed to harmful air. However, there was some good news too: the number of people living in counties that received failing grades for soot pollution—both short-term spikes and year-round exposure—actually decreased compared to previous years. Still, the numbers remain troublingly high, with 61 million people living in areas with dangerous short-term soot pollution spikes and another 75 million in counties with year-round soot pollution problems. Geography matters tremendously in this story. Southern and southwestern states showed particularly high levels of particle pollution, with several metropolitan areas in Texas facing notable problems. It’s a reminder that air quality isn’t uniform across America—where you live dramatically affects what you breathe.

America’s Most and Least Polluted Cities

When it comes to the dubious honor of America’s most polluted city, Bakersfield, California, takes the top spot for the worst year-round particle pollution. This California city also ranked third for both short-term particle pollution and ozone pollution, making it a triple threat on the pollution lists. The top five most polluted cities read like a cautionary geography lesson: Bakersfield-Delano in California, Brownsville-Harlingen-Raymondville in Texas, Eugene-Springfield in Oregon, Fresno-Hanford-Corcoran in California, and a tie between San Diego-Chula Vista-Carlsbad and Visalia, both in California. California’s dominance on this list is striking and concerning. Another independent report by Swiss technology company IQAir added El Paso, Texas, and Los Angeles, California, to the list of America’s most polluted areas, while noting that pollution concentrations across the entire United States increased by 3% between 2024 and 2025—a national trend in the wrong direction. But it’s not all bad news. Some American cities are getting it right when it comes to clean air. Bozeman, Montana, topped the list of cities with the cleanest air for year-round particle pollution, nudging past Casper, Wyoming, which held the crown in 2025. The top five cleanest cities offer a breath of fresh air, literally: Bozeman, Montana; Casper, Wyoming; Kahului-Wailuku, Hawaii; Urban Honolulu, Hawaii; and Burlington-South Burlington-Barre, Vermont. These cities prove that clean air is possible in America; we just need to figure out how to replicate their success more broadly.

New Threats on the Horizon: The AI Factor

Just when we thought we understood the major sources of air pollution—power plants, cars, industrial facilities—a new culprit has emerged: data centers powering artificial intelligence. As AI technology explodes in popularity and application, the massive data centers required to train, maintain, and operate these systems are increasingly contributing to air pollution. It’s a modern twist on an old problem, and one that many people probably haven’t considered. When you ask ChatGPT a question or use AI to edit a photo, you’re not just using software on your device—you’re tapping into enormous data centers that consume massive amounts of energy. Stewart emphasizes the need for public awareness about this emerging pollution source, stressing that any new data centers should incorporate state-of-the-art pollution controls, regardless of whether they’re burning fossil fuels or relying on backup generators. This represents a collision between technological progress and environmental health, raising important questions about how we balance innovation with the well-being of our communities. As AI continues its rapid expansion into every corner of our lives, the environmental costs of this digital revolution demand serious attention.

Policy Rollbacks and the Fight for Clean Air

Perhaps the most alarming aspect of the current air quality situation isn’t just the pollution itself, but the recent policy decisions that threaten to make things worse. The American Lung Association’s report explicitly called out the Trump administration for actions that have weakened air quality protections, particularly the controversial decision to repeal the “endangerment finding”—a landmark scientific determination that linked greenhouse gases to human health problems. In February, President Trump’s Environmental Protection Agency announced that greenhouse gases from cars, power plants, and other major sources would no longer be federally regulated. This represents a dramatic reversal of decades of environmental policy. Since the Clean Air Act became law in 1970, emissions of common air pollutants had fallen dramatically—a testament to what’s possible when we prioritize public health through regulation. However, recent data shows emissions rising again, a troubling trend that these new policy rollbacks may accelerate. The report’s authors didn’t mince words, writing that “contrary to its mission, EPA has recently acted to weaken, delay or revoke key health protections that will leave America’s children more exposed and more vulnerable to the consequences of many different pollutants.” They emphasized that the agency “must not devalue the benefits of removing deadly pollution from the air children breathe.” This represents more than policy disagreements or political debate—it’s about the fundamental question of whether we’ll protect our children’s health and their right to breathe clean air. With 152 million Americans already breathing unhealthy air, including 33 million kids, the stakes couldn’t be higher. The path forward requires balancing economic concerns, technological advancement, and environmental protection, but one thing remains clear: clean air isn’t a luxury or a political talking point—it’s a basic necessity for healthy communities and thriving children.