GeoffL
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And here's a small extract from a Birmingham University study, which clearly shows PM1 figures are not included in PM2.5 figures.
Birmingham University said:PM1 is widely believed to provide better information on the anthropogenic fraction of particulate 29 matter pollution than PM2.5. However, data on PM1 are still limited in Europe
And from Bristol and extract which says the burning of fuels is having adverse affects on health.
Bristol propaganda said:Health Impact, Air pollution generated from human sources such as the combustion of fuels for heat, electricity and transport is having an adverse effect on the health of Bristol’s communities.
"PN concentrations" -- as noted in my earlier post. From the same reference, "Particles may be described in terms of surface area per particle, in terms of particle number (PN) or mass, or in terms of the concentration of either of those metrics within an aerosol volume." Thus effectively, particle number is a measure of particle size and hence the sentence, "A source apportionment study in London estimated that the total PN concentrations in the city’s ambient air were derived as follows:[...]" is meaningless as "PN concentrations" is both ambiguous and undefined. However, since the particle number of PM1 is 1,000,000 vs 64 for PM2.5, about the only possible interpretation should it not be a typo is that they've skewed the data to give PM1 1,000,000/64 = 15,625 times the significance of PM2.5, which is mendacious at the very least.p.s. what do you think the typo is?