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Articles tagged "Pollen"

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PM10: dust, pollen, and the coarse fraction

Larger particles that mostly get filtered in the upper airway, but they still matter for allergies, asthma, and visibility.

Updated 2026-05-25

Pollen and ozone: the outdoor numbers that change your indoor advice

When outdoor ozone or pollen is high, "open a window" stops being good advice.

Updated 2026-05-25

Pollen species: the six that matter most

Alder, birch, grass, mugwort, olive, ragweed. Open-Meteo reports each; the seasons are very different.

Updated 2026-05-25

Tree pollens, regional

A short list of headline genera covers the broad strokes, but tree pollens vary by region. Oak in the South, cedar in Texas, maple in the Northeast, birch in the North.

Updated 2026-05-25

Mold spore forecasts

Outdoor mold spore counts are tracked alongside pollen by allergy services. Different biology, often confused, sometimes the actual culprit when pollen seems low.

Updated 2026-05-25

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