4 ms·
If the pm 2.5 is low, are the nanoparticles also low? I live near a semi busy urban road, but there’s a wall of buildings + an alley between me and it. Pm 2.5
by graeme 7y ago
If the pm 2.5 is low, are the nanoparticles also low?
I live near a semi busy urban road, but there’s a wall of buildings + an alley between me and it. Pm 2.5 is very low at my place, and so is noise.
Never thought about the nanoparticles pm 2.5 doesn’t measure, but am assuming it’s similar.
- 0x38B 7y agoAccording to this article[1], nanoparticles drop off quickly compared to larger particles: "However, the highest averages were recorded inside the cars and buses: the closer to the source of the pollution, the exhaust pipes spewing out the fumes, the higher the total number of nanoparticles. The difference between walking by the kerbside of the road, and by the building side, on the same pavement – just a few short steps – was an average of 82,000 particles versus 69,000. The same readings registered no change in PM2.5." 1: https://www.bbc.com/future/article/20191113-the-toxic-killers-in-our-air-too-small-to-see https://www.bbc.com/future/article/20191113-the-toxic-killer... HN discussion: https://news.ycombinator.com/item?id=21552934 https://news.ycombinator.com/item?id=21552934