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Articles on PM 2.5

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People with a plan feel more empowered and self-reliant during wildfire disasters. They have better mental and physical health outcomes than those who were less prepared. (Shutterstock)

Prepare for the worst: 10 steps to get ready for wildfire smoke

Wildfire smoke is both inevitable and largely unpredictable. We need to change our activities and behaviours to limit exposure to wildfire smoke and protect health.
Air pollution exposure during mid to early life may be more important to developing Alzheimer’s disease than doctors realized. Cecilie Arcurs via Getty Images

Air pollution may contribute to Alzheimer’s and dementia risk – here’s what we’re learning from brain scans

The tiny air pollutants known as PM2.5, emitted by vehicles, factories and power plants, aren’t just a hazard for lungs. A study finds more brain shrinkage in older women exposed to pollution.
Sampling wildfire smoke sometimes means sticking a tube out the window of an airplane. Brett Palm/University of Washington

Wildfire smoke changes dramatically as it ages, and that matters for downwind air quality – here’s what we learned flying through smoke plumes

Thousands of chemical compounds in wildfire smoke are interacting with each other and sunlight as the smoke travels. For people downwind, it can become more toxic over time.
Reducing fine particle air pollution from petrochemical complexes, like this one near the Houston Ship Channel in Texas, is a low-cost way to lower air pollution mortality. AP Photo/David J. Phillip

Air pollution kills thousands of Americans every year – here’s a low-cost strategy to reduce the toll

A new study takes an innovative approach to reducing fine particle air pollution and spotlights key sources: factories that burn coal and oil, petrochemical plants and burning wood for home heating.

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