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Message Subject If you believe chemtrails are real . . . what source of information has reinforced your belief most?
Poster Handle George B
Post Content

According to the EPA in the US and like agencies in Europe the ground level concentrations went down. . . .
 Quoting: George B

But that is off by 40,000 to 100,000+ feet. The question is straospheric, not ground level SO2.
 Quoting: Anonymous Coward 36488183

Where do you think most of the man made sulfur comes from . . . it isn't manufactured at 35,000 feet???:Or on second thought maybe some of it is . . .
 Quoting: George B

Where do you think most of the man made sulfur comes from ?
 Quoting: Anonymous Coward 36488183

Conventional wisdom indicates it comes from the burning of fossil fuels. . . . aircraft is felt to contribute around 1% I believe. . . .

Page 2.40 [link to ozone.unep.org]

" The source for SO2 consists mostly of anthropogenic sources from fossil fuel use (~70 Tg (S) yr–1), with volcanic outgassing (including small eruptions) and biomass burning con- tributing 8-20 Tg (S) yr–1 (Graf et al., 1997; Andres and Kasgnoc, 1998) and 2.5 Tg (S) yr–1 (Hao et al., 1990), respectively. Note that portions of the latter sources are deposited directly into the free troposphere and can reach the stratosphere more efficiently. The amount of sulfur emitted by aviation in the upper troposphere and lower stratosphere was estimated to be 0.06 Tg (S) yr–1 in 1992 (see Fahey and Schumann et al., 1999). The Mt. Pinatubo eruption is estimated to have injected 20 Tg (S) directly into the lower stratosphere."

page 2.43

"Kjellström et al. (1999) estimated that aircraft emissions contribute less than 1% of the total sulfate mass in regions of high air traffic."
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