Reply to Which one of you was this? 78% of noise complaints lodged against Reagan Airport were made by one household!

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[quote=Anonymous][quote=Anonymous][quote=Anonymous]They are studying the exposures. They only discovered UFPs recently. For now, [b]they know it’s worse than exposure to diesel.[/b] And for diesel they know that indeed people have had increased morbidity and mortality for decades due to occupational hazards or living next to the highway.

“In a meta-analysis of exposure to diesel exhaust and lung cancer occurrence in three occupational studies, the identified dose-response relationship showed that occupational exposure to 1 μg EC/m3 during a 45 year work life would cause 17 excess lung cancers per 10,000 exposed using the EC content of diesel exhaust as metric [80]. Another recent analysis of 14 case-control studies estimated exposure to diesel exhaust particles using job-exposure matrices. In this study, occupational exposure to 1 μg EC/m3 during a 45 year work life would cause 4 excess lung cancers per 10,000 exposed using the EC content of diesel exhaust as metric.”

I would not take the chance. If my work required the exposure, I would wear a mask (and they do — earmuffs and masks and goggles). Just like I wouldn’t buy a house next to the highway, I wouldn’t buy one under the flight path. How is that confusing?[/quote]
DP. Definitely calling bullsh!t [i]here[/i][b]. Jet A is essentially highly refined kerosene, with some additives (mostly ethanol and naphtha based) for anti-gelling in cold temps. Diesel is competitively quite dirty compared to regular kerosene, and extremely dirty compared to Jet A. I was in the Army, and many military vehicles have what are called “multi fuel” engines, which can run on diesel, kerosene, Jet A, gasoline, or any combination of any or all of these. We would always try to run our trucks in our motor pool on Jet A, which was always available because the M1A1 uses Jet A. We liked using Jet A because unlike diesel, it gave NO exhaust soot or smoke, and the exhaust was far less stinky than diesel, which was really important because sometimes you’d be parked somewhere all day with the engine and generator  running, and you’d be inhaling diluted fumes from the exhaust all day. The diesel was awful compared to Jet A. There’s no friggin way Jet A is more harmful than diesel. Nope. You are never going to convince me of that. It’s quite the opposite. I lived it.

[/quote]

Three points, sourced:

1. Exposure to UFPs is bad for you - we just don’t know yet how bad; they are tiny and push into your organs and can readily travel to the brain through olfactory nerve for example: cardiovascular, lung, brain are the most affected organ systems 
2. UFPs concentrate under the flight path; they don’t gently float around and disperse 
3. Jet A reduced soot but not the UFPs; in any case jet oil and lubricants are a big culprit

Exposure to UFP is strongly linked to adverse health effects and guidance for exposure limits has recently been provided by the World Health Organization (WHO). While the epidemiologic evidence for UFP health effects is still limited, there exist some studies to inform quantitative concentration–response functions for all-cause mortality, and recent large epidemiologic studies have considered UFP exposure estimates for a variety of outcomes, including breast cancer, ischemic heart disease, prostate cancer, asthma, and COPD.

It’s not just the soot from jet fuel even if they used Jet A, it’s the nano particles from burning it plus from of all the additives, oil and lubricants. Essentially things like organophosphates and oils, hydrocarbons etc.

Nature article on the UFPs:
https://www.nature.com/articles/s43247-022-00653-w

NIH showing how concentrated the UFPs are right under the flight path (not dispersed):
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7931448/

Jet A public health warning:
https://www.atsdr.cdc.gov/ToxProfiles/tp121-c1-b.pdf

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