The following video is an excellent speech by Rosalind Peterson, President of the Agriculture Defence Coalition, who addresses a 2007 UN conference on the dangers of weather modification.

Peterson warns that our skies are being polluted due to weather modification (cloud seeding), aircraft exhaust and NASA rocket experiments – something that believers in the chemtrails conspiracy believe cause a whole host of health problems, including:

Neurological effects, heart damage, eyesight issues, reproduction failures, immune system damage, gastrointestinal disorders, damaged kidney, damaged liver, hormonal problems, and more.

Correction: An earlier version of this article incorrectly stated that Rosalind Peterson had claimed that “chemtrails are real.” Peterson does not mention “chemtrails” in her speech, only normal weather modification (cloud seeding), regular aircraft exhaust and some NASA rocket experiments. She does, however, discuss geoengineering – a practise some conspiracy theorists believe is synonymous with chemtrails.

This article was originally published in 2015 and is frequently updated