Maricopa County | The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for Maricopa County on May 21, 2025, due to expected ozone levels exceeding federal health standards. Residents, especially children and those with respiratory conditions, are advised to limit outdoor activity and follow recommended actions like driving less and avoiding wood burning to help reduce harmful emissions.

Portsmouth City Council | Portsmouth’s new “Air Quality Heroes” campaign highlights the benefits of sustainable travel by sharing real-life stories of residents using public transport, cycling, and walking. Through short films, the initiative aims to challenge misconceptions and encourage behavior changes that support cleaner air and healthier communities.

Arizona Emergency Information Network | The Arizona Department of Environmental Quality has issued a High Pollution Advisory for ozone on May 21, 2025, warning that levels may exceed federal health standards and urging residents to limit outdoor activity and reduce emissions. Residents are encouraged to drive less, avoid using leaf blowers, delay painting projects, and eliminate wood burning to protect public health, especially for children and individuals with respiratory conditions.

Olympic World Library | This narrative review, prepared for the IOC, compiles current evidence on how air pollution affects athlete health and performance, especially during major sporting events held in areas with poor air quality. It underscores growing concerns among organizers and athletes and highlights critical research gaps that need addressing to guide safer competition practices.

IDEAS/RePEc | Air pollution from Kaohsiung Linhai Industrial Park significantly depresses nearby housing prices, with sulfur dioxide (SO₂) having the most pronounced effect due to its visible haze. The study highlights the social costs of industrial overdevelopment and calls for regular assessments of the “shadow price” residents pay, offering policy recommendations for sustainable industrial planning.

Science News | The AI model Aurora can generate highly accurate weather forecasts—including cyclone tracks and air pollution—in seconds, outperforming traditional systems and offering new capabilities to regions lacking supercomputing resources. Trained on over a million hours of atmospheric data and fine-tuned for specific tasks, Aurora marks a major advancement in fast, scalable Earth systems prediction.

Nature | In a study of 270 pregnant women from the French SEPAGES cohort, increased NO₂ exposure was linked to altered immune responses, including higher IL-10 and lower PHA-activated TNF levels. PM2.5 oxidative potential, rather than mass concentration, was associated with shifts in cytokine levels, suggesting that air pollution may modulate immune function during pregnancy.

Pacific University | Valentina Casab-Klescova, a senior at Pacific University, explored biophilic urban design in Singapore and Barcelona for her senior project, highlighting how green infrastructure improves livability and mental health. Inspired by her upbringing in polluted Mexico City, she plans to pursue a career in environmental policy or design after a gap year.

CNN | Today’s 5 Things PM covers issues ranging from concerns over summer airline travel disruptions to a crackdown on unapproved weight-loss drug alternatives. Also highlighted are environmental justice complaints over Elon Musk’s new AI facility in Memphis, inequities in EU visa denials for Africans, and a young engineer using fashion tech to inspire interest in coding.

Energy Live News | Enact Equality is urging the UK government to prioritize environmental justice, highlighting how air pollution disproportionately harms people of colour and low-income communities. Backed by nearly 40 MPs and Peers, the campaign calls for clean transport investment, stricter air quality laws, and policies shaped by those most affected.

Maricopa County | The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for Maricopa County on May 21, 2025, due to expected ozone levels exceeding federal health standards. Residents, especially children and those with respiratory conditions, are advised to limit outdoor activity and follow recommended actions like driving less and avoiding wood burning to help reduce harmful emissions.

Portsmouth City Council | Portsmouth’s new “Air Quality Heroes” campaign highlights the benefits of sustainable travel by sharing real-life stories of residents using public transport, cycling, and walking. Through short films, the initiative aims to challenge misconceptions and encourage behavior changes that support cleaner air and healthier communities.

Arizona Emergency Information Network | The Arizona Department of Environmental Quality has issued a High Pollution Advisory for ozone on May 21, 2025, warning that levels may exceed federal health standards and urging residents to limit outdoor activity and reduce emissions. Residents are encouraged to drive less, avoid using leaf blowers, delay painting projects, and eliminate wood burning to protect public health, especially for children and individuals with respiratory conditions.

Olympic World Library | This narrative review, prepared for the IOC, compiles current evidence on how air pollution affects athlete health and performance, especially during major sporting events held in areas with poor air quality. It underscores growing concerns among organizers and athletes and highlights critical research gaps that need addressing to guide safer competition practices.

IDEAS/RePEc | Air pollution from Kaohsiung Linhai Industrial Park significantly depresses nearby housing prices, with sulfur dioxide (SO₂) having the most pronounced effect due to its visible haze. The study highlights the social costs of industrial overdevelopment and calls for regular assessments of the “shadow price” residents pay, offering policy recommendations for sustainable industrial planning.

Science News | The AI model Aurora can generate highly accurate weather forecasts—including cyclone tracks and air pollution—in seconds, outperforming traditional systems and offering new capabilities to regions lacking supercomputing resources. Trained on over a million hours of atmospheric data and fine-tuned for specific tasks, Aurora marks a major advancement in fast, scalable Earth systems prediction.

Nature | In a study of 270 pregnant women from the French SEPAGES cohort, increased NO₂ exposure was linked to altered immune responses, including higher IL-10 and lower PHA-activated TNF levels. PM2.5 oxidative potential, rather than mass concentration, was associated with shifts in cytokine levels, suggesting that air pollution may modulate immune function during pregnancy.

Pacific University | Valentina Casab-Klescova, a senior at Pacific University, explored biophilic urban design in Singapore and Barcelona for her senior project, highlighting how green infrastructure improves livability and mental health. Inspired by her upbringing in polluted Mexico City, she plans to pursue a career in environmental policy or design after a gap year.

CNN | Today’s 5 Things PM covers issues ranging from concerns over summer airline travel disruptions to a crackdown on unapproved weight-loss drug alternatives. Also highlighted are environmental justice complaints over Elon Musk’s new AI facility in Memphis, inequities in EU visa denials for Africans, and a young engineer using fashion tech to inspire interest in coding.

Energy Live News | Enact Equality is urging the UK government to prioritize environmental justice, highlighting how air pollution disproportionately harms people of colour and low-income communities. Backed by nearly 40 MPs and Peers, the campaign calls for clean transport investment, stricter air quality laws, and policies shaped by those most affected.