Lifestyle
LA fires: Long-term exposure to wildfire smoke is poorly understood − and a growing risk
Wildfires in Los Angeles expose millions to harmful smoke containing toxic chemicals, increasing the need for understanding long-term health impacts.
Luke Montrose, Colorado State University
Millions of people across the Los Angeles area are being exposed to wildfire smoke as fires burn through homes and vehicles. The fires in January 2025 have burned thousands of structures, along with the building materials, furniture, paints, plastics and electronics inside them.
When materials like these burn, they can release toxic chemicals with the potential to harm people breathing the air downwind.
A 2023 study of smoke from fires in the wildland-urban interface – areas where urban neighborhoods bleed into the wildlands – found it contained a vast array of chemicals harmful to humans, including hydrogen chloride, polycyclic aromatic hydrocarbons, dioxins and a range of toxic organic compounds, including known carcinogens such as benzene, as well as toluene, xylenes, styrene and formaldehyde. The researchers also found metals in the smoke, including lead, chromium, cadmium and arsenic, which are known to affect several body systems, such as the brain, liver, kidney, skin and lungs.
The short-term effects of exposure to smoke like this can trigger asthma attacks and cause lung and cardiac problems.
But smoke can also have long-term effects, and those are less well understood. As an environmental toxicologist who focuses on wildfire smoke health effects, I, along with many of my colleagues, am increasingly concerned about the impact of long-term and repeated exposures to wildfire smoke that more people are now facing.
Long-term smoke exposure is increasing
Nationwide, the acreage burned in wildfires in the U.S. has nearly doubled each decade since 1990. That is changing how people are exposed to wildfire smoke.
Communities have found themselves blanketed in smoke for days and weeks at a time increasingly often. In 2023, massive wildfires in Canada repeatedly spread thick smoke into many U.S. communities. Controlled burns, which firefighters set to clear away flammable brush and reduce the severity of future wildfires, also add smoke to the air.
Wildfire smoke is now the leading source of PM2.5 – microscopic particulate matter than can penetrate into the lungs – in the western U.S.
This growing exposure increases the need to understand the long-term consequences of living and working in wildfire-risk areas.
Dose, duration and frequency matter
When scientists study the health risks of wildfire smoke, they tend to use analysis methods that were developed to assess health effects caused by low-level, chronic, urban air pollution exposures – picture car exhaust or smokestack emissions. However, these approaches fail to capture the dynamic and intense nature of wildfire smoke.
Researchers suspect there are differing consequences for people exposed to smoke at varying intensities and durations. Repeated exposure to wildfire smoke may also have compounding health effects over time.
To study the long-term impact of wildfire smoke, scientists need to know how much smoke people were exposed to, for how long and how often. That’s not an experiment anyone can conduct on humans in a lab, but the data can be gathered from communities being affected by wildfires.
Right now, however, this kind of data collection is rare.
Most studies that have explored long-term exposure, such as its impact on dementia or pregnancy, have used an average exposure over years rather than detailed data on exposures.
A few have focused on specific events. For example, a study of residents who had been exposed to six weeks of smoke during the 2017 Rice Ridge Fire near Seeley Lake, Montana, found their lung function was significantly reduced for at least two years after the fire. That was a forest fire, and while burning vegetation is bad, it’s generally thought to be less toxic than burning buildings.
Thinking differently about smoke exposure
Improving understanding of the long-term effects of wildfire smoke will require thinking differently about smoke.
If epidemiologists can begin clearly defining the negative health effects from wildfire smoke exposure in terms of dose, duration and frequency in their studies, taking into account the dynamic and episodic nature, then toxicologists can model these human experiences in animal experiments.
These experiments would have the potential to improve the understanding of the long-term health risks and then help scientists develop effective guidelines and strategies to mitigate harmful exposures.
Luke Montrose, Assistant Professor of Environmental and Radiological Health Sciences, Colorado State University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Lifestyle
The degree lost its halo: More US adults now see certifications as the safer, smarter career bet
(Tiffany Miller) For decades, the four-year degree carried an unquestioned authority. It was expensive, but it was the answer. New research from U.S. Career Institute, an online career training provider, finds that authority is no longer going unquestioned.
When asked which education path offers better long-term job security, 26% of adults say certifications or skills-based programs are the safer choice, compared with just 18% who say the same about a four-year degree. The traditional degree path has not gone away, but the certainty around it has started to crack.
The doubt extends to the cost. College was supposed to be expensive and worth it. The expensive part has not changed. The worth-it part is now a more open question. While 38% say paying for college feels like a necessary investment despite the expense, 29% say they question whether it is worthwhile. Asked at what level of student debt they would begin to reconsider, 32% say the threshold is under $10,000.
Artificial intelligence is also adding pressure from a different direction. One in 4 survey respondents said office-based and white-collar workers are the type most likely to be replaced by AI in the next five years. For many, that concern is already part of how they are thinking about major decisions. Fifty-four percent of adults have reconsidered their education or career path due to concerns about job security or automation.
Some have already acted on it. Twenty-five percent say they have already completed a certificate or skills-based program, and another 29% say they have seriously considered pursuing one.
In this survey, stability has replaced prestige as the thing people say they are actually looking for. It is the most commonly cited factor influencing career decisions today, named by 53% of respondents, with prestige and status ranking lower.
It is also shaping the advice people give the next generation. Asked what they would recommend to a young person starting out today, 30% say a certification or skills-based program, while 24% say a four-year degree.
For many, the reconsideration is personal. Twenty-seven percent say they would choose a different path entirely if making their education or career decision today, and 33% say they would look for something faster or more affordable. Knowing what they know now, just 17% say they would make the same choice again. The question of whether college was the right call is one that more U.S. adults are now willing to ask out loud.
Methodology
U.S. Career Institute commissioned Atomik Research to conduct an online survey of 1,000 adults ages 18 to 54 throughout the United States. The margin of error is plus or minus 3 percentage points at a 95% confidence level. Fieldwork was conducted between April 22 and April 27, 2026. Atomik Research, part of 4media group, is a creative market research agency.
Photo courtesy of Shutterstock
SOURCE:
📰 Thanks for reading STM Daily News – your source for News You Can Use This Moment!
We love hearing from our readers. Share your thoughts in the comments section and join the conversation with our growing community. Your feedback helps us create the stories and features that matter most to you.
Don’t miss the latest news, inspiring stories, lifestyle tips, food and drink features, and exclusive updates. Subscribe to the STM Daily News newsletter and get our top stories delivered directly to your inbox.
💬 Leave a comment.
📧 Subscribe to our newsletter.
📢 Share your favorite stories with friends and family.
Stay informed, stay connected, and be part of the STM Daily News community at STMDailyNews.com.
News
How healthy is Sodastream?
The SodaStream Sparkling Water Maker is a device that forces carbon dioxide (CO2) gas (stored under pressure in a cylinder) into water, making it sparkling (fizzy)
Sodastream machines have been gaining popularity in recent years as an alternative to store-bought soft drinks. Not only are they more environmentally friendly, but they also offer several health benefits compared to traditional sodas.
Reduced Sugar Intake
One of the most significant health benefits of using a Sodastream machine is reducing sugar intake. Traditional sodas are loaded with sugar, and excessive sugar intake can lead to weight gain, obesity, and other health problems such as Type 2 diabetes. With a Sodastream machine, you can control the amount of sugar you add to your drink, allowing you to enjoy a refreshing beverage without the harmful effects of excessive sugar consumption.
No Artificial Sweeteners
Many store-bought soft drinks contain artificial sweeteners, which can have negative health effects such as headaches and digestive problems. Sodastream machines, on the other hand, allow you to use natural sweeteners such as fruit extracts, honey or agave nectar, giving you a healthier and more natural alternative.
No Preservatives
Another advantage of using a Sodastream machine is that you can avoid preservatives commonly found in store-bought soft drinks. Preservatives such as sodium benzoate and potassium sorbate have been linked to health problems such as cancer and allergies. By making your own drinks, you can avoid these harmful additives and enjoy a healthier, preservative-free beverage.
Eco-Friendly
In addition to the health benefits, using a Sodastream machine is also environmentally friendly. Traditional soft drinks are packaged in plastic bottles or cans, which contribute to environmental pollution. With a Sodastream machine, you can reuse the same bottle multiple times, reducing waste and helping to reduce your carbon footprint.
Variety
Finally, Sodastream machines offer a wide variety of flavors and options, allowing you to customize your drink to your liking. You can mix and match different flavors or create your own unique blends, giving you a healthier and more enjoyable alternative to traditional sodas.
In conclusion, Sodastream machines offer several health benefits compared to traditional store-bought soft drinks. By reducing sugar intake, avoiding artificial sweeteners and preservatives, and being eco-friendly, they offer a healthier and more sustainable alternative to traditional soft drinks. Moreover, with a wide variety of flavors and options, you can customize your drink to your liking, making it a fun and enjoyable way to stay healthy.
Food and Beverage
Harness Peanut Power for Improved Cognitive Health
A healthy brain goes beyond reading exercises and completing puzzles – it extends to the kitchen, too. Emerging nutritional science is clear that what people eat doesn’t just fuel the body; it shapes memory, mood and cognitive health.
(Feature Impact) A healthy brain goes beyond reading exercises and completing puzzles – it extends to the kitchen, too. Emerging nutritional science is clear that what people eat doesn’t just fuel the body; it shapes memory, mood and cognitive health.
Among the foods you can include in your diet to give your brain a boost are peanuts and peanut butter, staples valued not only for their convenience but also for their cognitive benefits. In fact, a study published in the “Journal of the Prevention of Alzheimer’s Disease” found adults 60-80 years old who did not eat peanuts and peanut butter regularly were 30-50% more likely to perform poorly on tests measuring learning, memory, language, processing motor speed and attentiveness compared to those who did consumer peanuts and peanut butter.
It’s not just the older generation that can benefit. According to research published in “Clinical Nutrition,” a study of college students ages 18-33 showed consumption of peanuts and peanut butter was associated with improved memory function and decreased anxiety, depression and stress.
Consider this key information from the Georgia Peanut Commission before your next meal planning session.
Nutrients that Give the Brain a Boost
Despite their small stature, peanuts pack a nutrition punch. Their unique blend of various vitamins, minerals and bioactive compounds includes:
- Niacin, which can slow cognitive decline and reduce the risk for Alzheimer’s disease, according to the “Journal of Neurology, Neurosurgery and Psychiatry”
- Vitamin E, found to promote healthy brain aging and delay cognitive decline
- Resveratrol, believed to be beneficial in fighting against Alzheimer’s disease and other nerve degenerating diseases, per the “Journal of Biological Chemistry”
- P-coumaric acid, an antioxidant that appears to target the neurotransmitters in the brain that regulate mood, stress and anxiety
Peace of MIND
Peanuts are included in the MIND diet, a combination of the Mediterranean and DASH diets, which specifically includes foods shown to benefit the brain.
Adding peanuts to your menu can be a breeze. Look no further than a powerful main course like Crunchy and Creamy Cold Green Pea and Peanut Salad, a perfect accompaniment at potlucks and cookouts as an easy side or light main course.
Brain Food for Thought
Supporting your brain starts with the right nutrition, and evidence makes clear peanuts and peanut butter should be top-of-mind as you head to the grocery store. For help getting started, find more recipes and nutritional information by visiting GAPeanuts.com.
Crunchy and Creamy Cold Green Pea and Peanut Salad
Recipe courtesy of The Peanut Institute
Servings: 8
Dressing:
- 1/3 cup sour cream
- 1 1/2 tablespoons mayonnaise
- 2 teaspoons apple cider vinegar
- 2 teaspoons sugar
Salad:
- 1 package (20 ounces) green peas, frozen
- 1 cup celery, chopped
- 1/3 cup red onions, chopped
- 1 cup dry roasted peanuts
- 6 slices thick cut bacon, cooked and crumbled
- 1 pinch salt, or to taste
- 1 pinch freshly ground black pepper, or to taste
- To make dressing: In small mixing bowl, whisk sour cream, mayonnaise, apple cider vinegar and sugar.
- To make salad: In large mixing bowl, combine frozen green peas, celery and onion. Pour dressing over salad and toss to combine. Refrigerate at least 2 hours.
- Before serving, stir in roasted peanuts and crumbled bacon. Season with salt and freshly ground black pepper.
Nutritional information per serving: 230 calories, 17 g carbohydrates, 12 mg cholesterol, 3 g saturated fat, 9 g unsaturated fat, 5 g fiber, 11 g protein, 249 mg sodium, 6 g sugar, 1 g added sugar.
SOURCE:
STM Daily News’ Food and Drink section highlights the stories, trends, flavors, and events shaping today’s food culture. From recipes to restaurant news, it keeps readers connected to what’s fresh and worth tasting.
