During his long talk, he spoke about the threats and interests of the United States and how to a large extent for the CIA the Islamic State is a threat and is impacting the world, Brennan also commented on the subject of geoengineering:
"Another example is the range of technologies - often collectively referred to as geoengineering, that could help reverse the warming effects of global climate change.
One that has gained my personal attention is a stratospheric aerosol injection, or SAI, a method of seeding the stratosphere with particles that can help reflect heat from the sun, in the same way that volcanic eruptions do. "
Brennan went on to echo questions from some scientists about aerial spraying:
"Such a program could limit global temperature rise, reduce some risks associated with high temperatures, and make additional time to transition from fossil fuels to the global economy. The process is also relatively inexpensive. The Higher Council for Scientific Research estimates that a fully deployed SAI application would cost around $ 10 billion annually. "Brennan talked about injecting stratospheric aerosol and this shows that he and the CIA have probably been considering this for some time.
"Chemtrails" have long been a subject of conspiracy theories with massive amounts of misinformation being published all over the internet, including studies and fake photos. However, several actual studies show that this is geoengineering.
A study published in the International Journal of Research on the Environment and Public Health in the US is suggesting that geoengineering has already begun, and the substance being used is a toxic by-product of coal called fly-away coal ash.
The part of the speech, where Brennan talks about geoengineering, begins at 12:05 in the following video: