The finding was part of a three-year, $800,000 study commissioned by the Federal Aviation Administration and carried out in part by researchers at the University of Dayton Research Institute.
They that pay the piper call the tune.
It is well-documented that any researcher who comes up with evidence disproving global warming will never get another NSF grant. A physics professor at my alma mater confided to me that whenever he applied for a grant he already had the research done and the paper written.
When an agency pays for research it is paying to get the results it wants. Someday when you get real job you'll see things differently.