California Air Resources Board – CA.gov | California and Quebec announced results from their 46th joint carbon allowance auction, with all 54.98 million current vintage permits sold at a $27.94 settlement price and most advance vintage allowances also purchased at the same price.

Nature | A study using high-resolution data from four major Chinese cities found that tree-based machine learning models can accurately and interpretably forecast six major air pollutants, supporting improved urban air quality warning systems and regulatory planning.

Euronews.com | An air quality index of 7 indicates “poor” air quality with elevated pollution levels that can affect health prompting recommendations to limit outdoor activity, reduce exercise, and consider indoor air purifiers or protective masks during prolonged exposure.

The Cardiology Advisor | Study findings presented at the International Stroke Conference show that spikes in ozone and PM2.5 during the 2023 Canadian wildfires were associated with increased stroke incidence, higher hemorrhagic stroke risk, and greater stroke severity in an urban underserved population.

E&E News by POLITICO | An EPA report shows that nationwide emissions of five major air pollutants declined between 2020 and 2024 under the Biden administration, even as the Trump administration moves to roll back environmental regulations and expand fossil fuel use.

Phys.org | A new study finds that extreme heat waves can drive new aerosol particle formation at temperatures up to 40°C, as intense sunlight transforms volatile organic compounds into organic acids that self-assemble into nanoparticles.

The Cool Down | A new study finds that wintertime PM2.5 pollution in the Balkans often exceeds levels seen in Beijing, contributing to thousands of premature deaths annually.

California Air Resources Board – CA.gov | California and Quebec announced results from their 46th joint carbon allowance auction, with all 54.98 million current vintage permits sold at a $27.94 settlement price and most advance vintage allowances also purchased at the same price.

Nature | A study using high-resolution data from four major Chinese cities found that tree-based machine learning models can accurately and interpretably forecast six major air pollutants, supporting improved urban air quality warning systems and regulatory planning.

Euronews.com | An air quality index of 7 indicates “poor” air quality with elevated pollution levels that can affect health prompting recommendations to limit outdoor activity, reduce exercise, and consider indoor air purifiers or protective masks during prolonged exposure.

The Cardiology Advisor | Study findings presented at the International Stroke Conference show that spikes in ozone and PM2.5 during the 2023 Canadian wildfires were associated with increased stroke incidence, higher hemorrhagic stroke risk, and greater stroke severity in an urban underserved population.

E&E News by POLITICO | An EPA report shows that nationwide emissions of five major air pollutants declined between 2020 and 2024 under the Biden administration, even as the Trump administration moves to roll back environmental regulations and expand fossil fuel use.

Phys.org | A new study finds that extreme heat waves can drive new aerosol particle formation at temperatures up to 40°C, as intense sunlight transforms volatile organic compounds into organic acids that self-assemble into nanoparticles.

The Cool Down | A new study finds that wintertime PM2.5 pollution in the Balkans often exceeds levels seen in Beijing, contributing to thousands of premature deaths annually.