First, there is no "chemtrail" conspiracy, except to those proponents who cannot read or understand the sciences involved. Or that is how they make
their living.
That being said, the site of the source is a part of that same conspiracy. They believe and posit that "chemtrails" are real, and causing all
manner of ill. The page opens onto a report by Rosalind Peterson, a known lobbyist who believes in "chemtrails". She also believes that the
lines and grids formed by planes flying in more than one direction are a way to paint a target from space, or some other silliness. She is a Ph.D,
but not in meteorology. She also has a "chemtrail" internet site. Not an unbiased source.
I have carefully selected a reference on the "source" page, called "US GAO 200s Report Aviation Effects on Global Atmosphere".
GAO report
Aviation Effects on Global Atmosphere
From page 11 of that report, is this statistic:
In the United States, aviation’s contribution to increases in human-generated greenhouse gases is about 3 percent and can be compared with the
contributions of other U.S industrial sources. .
Further:
. Global aviation’s carbon dioxide emissions (measured in million metric tons of carbon) are a small percentage of carbon emissions worldwide
See how a biased source can exaggerate a claim? That a contribution of 3%, comparable with other sources, is proof of anything seems silly. What
are the other 97% sources and how can they be managed? Who knows? It's not "relevent" to "chemtrails" so is not discussed.
Other references from the OP source seemed picked based on their title alone. For example, there are numerous reports concerning the release of
pyrophoric chemicals from low-alt rockets to create both auroras and noculient clouds. These chemicals released are very reactive, burning
completely upon contact with air or water. The amount released is very, very small. The scope of the experiment was very limited, and the reaction
lasts just seconds to minutes. What do these have to do with "chemtrail"? It's an admitted reason for science to put some barium into the
atmosphere. Does this somehow translate to "chemtrails contain barium"? Not if you read and understand the studies invovlved. Similarly, there
are references to an Israeli/US collaboration of using radio waves in the atmosphere to perhaps predict earthquakes. Noises and lights before
earthquakes is a phenomena known and written about since Pliny. It's is the reverse of the supposed by "chemtrail theorists" tacked-on comspiracy
of HAARP being used to cause earthquakes. Why would this be included in such a list? It has nothing to do with aeronautics, meteorology, or
geo-engineering.
Geo-engineering is the new buzzword for "chemtrail" (although the field of "chemtrails" have many myths about the who, what, and why). It is not
a conspiracy, it is being opening discussed and studied by many different disciplines from many nations for many entities. There is no consensus if
it would work, how it would work, or if it is a benefit or detriment. It happens everyday that man has ever burned a fire, or produced smoke or dust
from industry.
It is not new, it is not being implemented purposely on any scale, and is NOT part of any "chemtrail conspiracy".
Because there is no conspiracy outside the inner workings of overactive imaginations.