Lolchan,
Unfortunately, the Belfort Group has ignored a common-sense approach to solving the conundrum they were faced with. There exists a segment of aviation enthusiasts known as "contrailspotters", hobbyists with cameras mounted on telescopes who collect high-resolution photos of planes making contrails, much as birdwatchers do with birds. One of their most prolific members resides in Belgium, the same airspace as the Belfort Group, and he displays photos at his website which demonstrate that it is indeed possible to positively identify the aircraft seen making "chemtrails".
site(scroll down and choose "United States Air Force", or any other common carrier):
https://www.skystef.be/contrail.htm
The question left begging is, since such technology is demonstrably available, why has Dr. Vermeeren or any other chemtrails promoter never taken advantage of it?
There is another tech available to ordinary people for remote sensing and ID of the planes seen making 'trails. Flight tracking software has been available for over a decade, and this user was able to identify 100% of 42 flights making "chemtrails" over Las Vegas last year as ordinary commecial passenger flights:
https://www.youtube.com/watch?v=FvXVvahXw4M
Mark Walker Evans, I declare you've been had in one of the Great Hoaxes of this century!