The Sunscreen Filter
(PM), microscopic atmospheric suspensions
of solid or liquid particles, produced by fossil
fuel combustion, by volcanoes, dust storms,
living vegetation and sea spray.
f) Aerosols, combined PMs and gas,
produced by fossil fuel combustion. Global
averages of anthropogenic aerosols indicate
that they account for 10% of total atmo-
g) Persistent free radicals associated with
h) Toxic metals, such as lead and mer-
cury, and their derivatives, produced by coal
i) Chlorofluorocarbons (CFCs), from
currently banned products, which destroy
tropospheric and stratospheric ozone; i.e.,
the Earth’s atmospheric UV filter.
j) Ammonia (NH3), produced by agri-
k) Radioactive PMs, produced by nuclear
2) Secondary air pollutants—formed by the
interactions of primary pollutants or second-
ary pollutant precursors, which are not pol-
lutants in and of themselves. Ground level
ozone is an ubiquitous secondary pollutant.
a) Photochemical smog, produced by
UV activation of primary PM and gaseous
pollutants and their consequent products.
Photochemical smog is derived from photo-
activated vehicular and industrial emissions
and primary smog.
b) Ground level ozone (O3), produced
by oxygen and VOC interactions—abnor-
mally high anthropogenically-derived con-
centrations contribute to the formation of
c) Peroxyacetyl nitrate (PAN), produced
by NOx and VOC interactions. PAN is a
thermally unstable secondary photochemi-
cal smog constituent, which decomposes
into peroxyethanoyl radicals and NO2. A
major anthropogenic source of PAN is etha-
nol added to automotive fuels.
d) Persistent organic pollutants (POPs),
organic compounds resistant to chemical,
biological, and photolytic environmental
degradation, which often attach to PMs; e.g.,
dioxins and furans. POPs may significantly
impact human health and the environment
because their persistence; i.e., metastabil-
ity, enables their: i) long-range transport, ii)
bioaccumulation in biological tissue, and,
consequent, iii) biomagnification in ecologi-
cal biocycles. POPs are usually endocrine
disruptors and/or mutagens/teratogens.
Although official Environmental
Protection Agency (EPA) recognition of air
pollution as a health issue was delayed by
special interest interference, a 1994 court
order obtained by the American Lung
Association (ALA) forced an official EPA
recognition of air pollution as an pandemic
public health threat in 1997.3
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YOUR SOURCE FOR NATURAL
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