Lac - Operation LAC (Large Area Coverage), was a
U.S. Army Chemical Corps operation which dispersed microscopic
zinc cadmium sulfide (ZnCdS) particles over much of
the United States. The purpose was to determine the
dispersion and geographic range of biological or chemical
Chart: I find it most important to point
out the maximum temperatures possible for a persistent contrail
before you check the site yourself. Below is the table right
from off their page:
Here are the numbers for the maximum temperature
possible for persistent contrails.
Ask yourself if temperatures can reach this
low at or beneath cumulus cloud altitude in the summer in
a warm climate where many of us have seen chemtrails. Natural
Cirrus clouds are made up of ice crystals due to their high
altitutude, cumulus clouds are not because they are closer
toward the ground.
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