From: Comment on the Nanoparticle Conclusions in Crüts et al. (2008), "Exposure to diesel exhaust induces changes in EEG in human volunteers"
McCreanor et al.[5]
Crüts et al.[1]
PM 2.5
28 μg/m3
300 μg/m3
Particle #
640,000 particles/cm3
1,200,000 particles/cm3
NO 2
80 ppb
1,600 ppb