Are chemtrails a conspiracy theory or intentional geoengineering activity ? What are contrails ?

What are chemtrails ? Is there a difference between chemtrails and contrails ? What is the truth regarding unmarked planes leaving behind trails that slowly descend upon the earth ?

Definition 1. The wikipedia definition ? “The chemtrail conspiracy theory is the unproven belief that long-lasting trails, so-called “chemtrails”, are left in the sky by high-flying aircraft and that they consist of chemical or biological agents deliberately sprayed for sinister purposes undisclosed to the general public.^[1] Believers in the theory argue that normal contrails dissipate relatively quickly and that contrails that do not dissipate must contain additional substances.^[2]^[3] These arguments have been dismissed by the scientific community: such trails are normal water-based contrails (condensation trails) that are routinely left by high-flying aircraft under certain atmospheric conditions.^[4] Although proponents have attempted to prove that the claimed chemical spraying does take place, their analyses have been flawed or based on misconceptions.^[5]^[6]“.

Definition 2. The UK government website seems to support the above view – https://www.gov.uk/government/publications/chemtrails-and-contrails–2 : “There are fundamentally two forms of contrails: those that are persistent and those that are non-persistent“.

Both of the above sources deny the use of chemtrails. However, is there any evidence to support that chemtrails do exist ?

The photo below was taken on a beautiful, bright sunny day in 2017. The aircraft left behind “chemtrails” that slowly disappeared. You will notice there are no markings on the plane:

On another day, a similar plane leaving chemtrails, also left behind a very thin layer of white “dust” (covering a black overcoat). Was this sheer coincidence ? The following video shows what elements appear to be contained in “chemtrail” emissions:

Evidence 1 – Dr. Rosalind Peterson, Californian President and Co-founder of the Agriculture Defense Coalition in 2006 was set up to protect crop production from uncontrolled weather modification programs including chemtrails:

In summary, Dr Peterson highlights the following concerns:

Chemtrails lasting for upto 20 hours with the potential to negatively effect photosynthesis, block sunlight, change weather conditions, and negatively effect crop production
NASA studies confirm such chemtrails are part of the cause of global warming
Chemtrails cause man made clouds that in turn, trap warmth in the atmosphere, causing increases in fungus growth, viruses, moulds, mildew, disease and pests to also proliferate
Aluminum and barium are increasingly appearing in drinking water
Aluminum negatively effects trees ability to absorb water, causing trees to die

Evidence 2 – The USA House bill HR2977 “The Space Preservation Act of 2001” actually lists and names chemtrails as government supported activity together with other concerning technologies (click the 4 images below to see the full document):

“Chemtrails, electronic weapons, psychotronic weapons, information weapons, and ultra low frequency weapons (elf waves).” Chemtrails are described as an “exotic weapons system” that can damage space, ionospehere, upper atmosphere, climate or weather, with especial focus on inducing damage to a target population.

Here is a link to the congressional documents – http://www.fas.org/sgp/congress/2001/hr2977.html.

Evidence 3: The CIA Director, John Brennan admits to chemtrails, otherwise known as stratospheric rosol injection at the Council of Foreign Relations in Washington, DC – 29 June 2016: