Finding F-0187

“Measured PM10, PM2.5, and P M1 concentrations with calculated PM1–2.5 and PM2.5–10 fraction show moderate (r = 0.68 and 0.66) correlation, on average, P M1 accounts for 91% of the measured PM10 concentration, while in the case of PM2.5, this reaches 95%.”

Kheirandish Characterization of carbonaceous aerosol particles emitted by solid fuel combustion in rural areas (2026). Environ Monit Assess. Page 8. CKB 1631

Structure

Source: Solid fuel
Factor: Particulate matter (PM₂.₅ and PM₁₀)
Setting: rural settlement (ambient), HU (winter 2025)
Study design: 6-week intensive winter measurement campaign in 2025 in a rural settlement near Budapest (Solymár) with an optical particle counter and a portable aethalometer, sources traffic, biomass burning and suspected illegal waste burning in residential stoves (class 4)
Effect: ratio 91
Averaging time: campaign average
Caveat: PM1 filed under particulate-matter, there is no finer slug

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.