Environmental effects of ozone
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Transcript of Environmental effects of ozone
ENVIRONMENTAL EFFECTS OF
OZONE
OZONE
It
damages
the
vegetation
OZONE
It shortens the
life of rubbers
and textile.
OZONE
It is an irritant gas to
humans, producing eye,
nose and throat
symptoms, as well as
alteration to normal lung
function.
OZONE
High concentrations
of ozone are
correlated with
decreased life
expectancy in
animals.
OZONE AND THE
SST
OZONE AND THE SST
SST consumes
enormous quantities of
fuel – 66 tons for each
hour of flight
OZONE AND THE SST
83 tons of H2O, 207 tons
CO2, 3 tons CO, 3 tons NO
enter the thin air in the
stratosphere.
SST MIGHT DO:
It might increase high
altitude cloudiness, possibly
affecting climate and giving
the sky a permanent haziness.
SST MIGHT DO:
The increased moisture
might deplete ozone
through series of
chemical reactions.
SST MIGHT DO:
Harold Johnston, achemistry
professor of the University of
California, completed calculations
which suggested that the ozone
shield was indeed threatened by the
SST fleet.
SST MIGHT DO:
NO + O3 = NO2 +
O2
RECENT FINDINGS IN
THE STRATOSPHERIC
OZONE
FINDINGS
Starting in the early
1970’s, predictions have
been made that human
activities will lead to the
diminishing of the earth’s
protective zone.
FINDINGS
The search for evidence of
downward trends of the
thickness of the ozone
layer was inconclusive
until the discovery of the
Antartic ozone hole in
1985
FINDINGS
Ozone decreases
during the Antartic
spring are now well
documented.
FINDINGS
Ozone decreases outside
the Antartic, at southern
mid-latitudes have been
reported, as well as the
heavy populated mid-
latitudes.
FINDINGS
The Antartic ozone
hole was deep and
long-lasting and
demonstrated that
1987 was not
unusual.
FINDINGS
1990 ozone hole was
also quite deep,
similar to both 1987
and 1989
FINDINGS
The area of the ozone
hole has remained
constant for the 4
years.