Most people can detect about 0.01 ppm (parts per million; "0.01ppm" = 1 part per 100 million) of ozone in the air;
detectable ozone typically has an odor reminiscent to chlorine bleach.
Exposure of 0.10 to 1.00 ppm produces headaches, burning eyes, and irritation to the respiratory passages.
Even low concentrations of ozone in air are very destructive to organic materials such as latex, plastics, and animal (including human) lung tissue.
[--per: the source that is not to be trusted without corroborating verification]
...
"NOx" is meant to indicate 'oxides of nitrogen', which essentially is just NITRIC OXIDE [NO] and NITROGEN DIOXIDE [NO2].
When NOx and VOCs* react in the presence of sunlight, they form photochemical smog, a significant form of air pollution, especially in the summer.
* (volatile organic compounds; see , for example, the "% VOC" listed on the side of a paint can.... Plastics, in particular, release "VOCs"...)
"Smog" does varying amounts of damage to lung tissue and reduction in lung function....
OXIDES OF NITROGEN (aka "Mono-nitrogen oxides") form 'nitric acid' in the air....
"N95 rating" --- "N95" is a government efficiency rating that means the mask blocks about 95 percent of particles that are 0.3 microns in size or larger.
...
" How Gas Masks Work " | http://science.howstuffworks.com/gas-mask.htm
...
Bureaucratic gobbildly-gook : http://www.cdc.gov/niosh/npg/pgintrod.html#mustread
No comments:
Post a Comment
note: Comment spam-guard enabled; and comments may be subject to moderation/approval before appearing.