Nature | Air pollution influences climate by altering the troposphere’s oxidation capacity, primarily through changes in hydroxyl radical (OH) levels that regulate methane breakdown. From 2005 to 2021, shifts in ozone, water vapor, and carbon monoxide collectively boosted the global methane sink, but extreme pollution events like wildfires and the COVID-19 pandemic caused abrupt OH declines, temporarily weakening this climate-buffering effect.

Inside Climate News | A planned expansion of the Transco natural gas pipeline through five southern states, including North Carolina, could drastically increase local air pollution and place thousands of residents, schools, and parks within a hazardous blast zone. Environmental advocates warn that the project would emit over 935,000 tons of greenhouse gases annually and significantly raise levels of harmful pollutants, while also posing safety and environmental risks to vulnerable communities already burdened by poor air quality.

AL.com | A Saharan dust plume traveling across the Atlantic is expected to reach the Gulf Coast this weekend, potentially reducing air quality, especially for individuals with respiratory conditions. Experts advise sensitive groups to stay indoors, use HEPA air purifiers, and wear masks if exposure is unavoidable.

Fox 13 News | A University of Utah study found that HVAC systems with air economizers can unintentionally draw wildfire smoke indoors, significantly impacting air quality. Researchers recommend using particulate matter sensors and simple portable air filters to help maintain cleaner indoor air during pollution events.

News-Medical.net | A new global study found that cardiovascular disease deaths and DALYs attributable to PM2.5 pollution rose by over 90% and 78%, respectively, from 1990 to 2021, despite declines in age-adjusted rates. The burden is highest among elderly populations and in moderately developed countries, with projections showing significant increases by 2045 due to aging and urbanization.

Arizona Emergency Information Network | The Arizona Department of Environmental Quality has issued a High Pollution Advisory for May 28–29, 2025, due to elevated levels of particulate matter and ozone. Residents are urged to reduce emissions through actions like carpooling, avoiding wood burning, and limiting outdoor activity, especially for vulnerable groups.

@theU – The University of Utah | A University of Utah study found that wildfire smoke infiltrates campus buildings with air-side economizer HVAC systems far more than dust or inversion pollution, highlighting ventilation type as a key factor in indoor air quality. Researchers recommend building-specific solutions, including portable filters and upgraded filtration, to balance energy efficiency with protection from outdoor pollutants.

News-Medical.net | New research reveals that personal care products like lotions and fragrances significantly disrupt the body’s natural “human oxidation field,” weakening its ability to protect against indoor ozone exposure. These products alter the formation of protective hydroxyl radicals, potentially increasing exposure to harmful byproducts in indoor air.

EurekAlert! | A study by TU Graz found that 75% of Austrian classrooms exceeded recommended CO₂ levels, with winter rates rising to 88%, indicating poor ventilation in most schools. Researchers recommend using low-cost CO₂ sensors and ventilation training to improve air quality, reduce infection risk, and support student health and learning.

EHN.org | Environmental groups have filed a federal lawsuit against Louisiana, claiming the state’s new law unlawfully suppresses community-led air monitoring by penalizing non-EPA-certified data sharing with fines up to $1 million. The law has chilled public health efforts in industrial areas like “Cancer Alley,” where grassroots monitoring fills critical gaps left by official oversight.

Nature | Air pollution influences climate by altering the troposphere’s oxidation capacity, primarily through changes in hydroxyl radical (OH) levels that regulate methane breakdown. From 2005 to 2021, shifts in ozone, water vapor, and carbon monoxide collectively boosted the global methane sink, but extreme pollution events like wildfires and the COVID-19 pandemic caused abrupt OH declines, temporarily weakening this climate-buffering effect.

Inside Climate News | A planned expansion of the Transco natural gas pipeline through five southern states, including North Carolina, could drastically increase local air pollution and place thousands of residents, schools, and parks within a hazardous blast zone. Environmental advocates warn that the project would emit over 935,000 tons of greenhouse gases annually and significantly raise levels of harmful pollutants, while also posing safety and environmental risks to vulnerable communities already burdened by poor air quality.

AL.com | A Saharan dust plume traveling across the Atlantic is expected to reach the Gulf Coast this weekend, potentially reducing air quality, especially for individuals with respiratory conditions. Experts advise sensitive groups to stay indoors, use HEPA air purifiers, and wear masks if exposure is unavoidable.

Fox 13 News | A University of Utah study found that HVAC systems with air economizers can unintentionally draw wildfire smoke indoors, significantly impacting air quality. Researchers recommend using particulate matter sensors and simple portable air filters to help maintain cleaner indoor air during pollution events.

News-Medical.net | A new global study found that cardiovascular disease deaths and DALYs attributable to PM2.5 pollution rose by over 90% and 78%, respectively, from 1990 to 2021, despite declines in age-adjusted rates. The burden is highest among elderly populations and in moderately developed countries, with projections showing significant increases by 2045 due to aging and urbanization.

Arizona Emergency Information Network | The Arizona Department of Environmental Quality has issued a High Pollution Advisory for May 28–29, 2025, due to elevated levels of particulate matter and ozone. Residents are urged to reduce emissions through actions like carpooling, avoiding wood burning, and limiting outdoor activity, especially for vulnerable groups.

@theU – The University of Utah | A University of Utah study found that wildfire smoke infiltrates campus buildings with air-side economizer HVAC systems far more than dust or inversion pollution, highlighting ventilation type as a key factor in indoor air quality. Researchers recommend building-specific solutions, including portable filters and upgraded filtration, to balance energy efficiency with protection from outdoor pollutants.

News-Medical.net | New research reveals that personal care products like lotions and fragrances significantly disrupt the body’s natural “human oxidation field,” weakening its ability to protect against indoor ozone exposure. These products alter the formation of protective hydroxyl radicals, potentially increasing exposure to harmful byproducts in indoor air.

EurekAlert! | A study by TU Graz found that 75% of Austrian classrooms exceeded recommended CO₂ levels, with winter rates rising to 88%, indicating poor ventilation in most schools. Researchers recommend using low-cost CO₂ sensors and ventilation training to improve air quality, reduce infection risk, and support student health and learning.

EHN.org | Environmental groups have filed a federal lawsuit against Louisiana, claiming the state’s new law unlawfully suppresses community-led air monitoring by penalizing non-EPA-certified data sharing with fines up to $1 million. The law has chilled public health efforts in industrial areas like “Cancer Alley,” where grassroots monitoring fills critical gaps left by official oversight.