In recent years,
smarmy leftists
have tried to create
the false impression
that carbon dioxide
is a pollutant.
A few studies
suggested exposure
to high CO2 concentrations
(~1,500 to 2,500 ppm)
severely impair
human cognitive
and decision-making
performance
(Satish et al., 2012,
Allen et al., 2016).
A 2018 study undermined
attempts to claim CO2 is a
brain-function-impairing toxin.
In the 2018 study,
Rodeheffer et al., 2018
subjects were exposed to
600, 2,500, and
15,000 ppm CO2.
The results were
“no significant differences”
in how the subjects performed
for any of the
CO2 exposure levels.
A new 2019 study finds the
cognitive and decision-making
performance of subjects
exposed to 5,000 ppm of CO2,
was “similar to, or exceeded”
the performance of those
exposed to 600 ppm.
The 2019 study supports
( Scully et al., 2019 )
supported the 2018 study.
For Scully et al., 2019,
there were four CO2 levels:
600, 1,200, 2,500, and 5,000 ppm.
2019 study results: There were
“no clear dose-response patterns”
evident for any of the
CO2 exposure conditions.
Subjects exposed
to 5,000 ppm actually
slightly exceeded
the performance
of subjects exposed
to 600 ppm CO2.
Elevated-CO2-is-toxic
-to-brain-functioning
is not supported by
real-world experiments.
CO2 REALITY:
Indoor (bedroom)
CO2 concentrations
vary between
about 600 ppm
during the day,
and 1,000 ppm
overnight .
Elementary school children
are routinely exposed to
1,500 to 3,000 ppm CO2
in their classrooms
( Corsi et al., 2002 ).
Driving alone in one’s car,
with no outside air
coming in, could mean
exposure of up to
4,100 ppm CO2
( Satish et al, 2012 )
People work comfortably
in commercial greenhouses
with elevated CO2 levels
of at least twice the normal
outdoors CO2 levels of 400 ppm,
( most often around 1,000 ppm.)
Modern buildings with no draft,
sealed-up designs often have
CO2 levels reaching twice the
atmospheric levels ( when filled
with lots of people ).
Humans maintain a body
CO2 concentration
of 20,000 ppm.
To maintain this concentration,
the volume of respiration varies.
We breathe primarily
to get rid of CO2,
only secondarily
to get oxygen.
Until the atmospheric
CO2 concentration
is close to 20,000 ppm
there will be no
cognitive impairment.