Analysis of information sources in references of the Wikipedia article "تئوری توطئه پسدمه" in Persian language version.
Some groups and individuals erroneously believe that the long-lasting condensation trails, or contrails, left behind aircraft are evidence of a secret large-scale spraying program. They call these imagined features "chemtrails".
Some theorists speculate that the goal is population control; some say it's climate modification; others say it's military weapons testing.(نیازمند آبونمان)
This conspiracy idea took hold in 1996 when the US Government was accused of trying to modify the weather for military means(نیازمند آبونمان)
The theory: The white lines of condensed water vapor that jets leave in the sky, called contrails, are a toxic substance the government deliberately sprays on an unsuspecting populace.
Some groups and individuals erroneously believe that the long-lasting condensation trails, or contrails, left behind aircraft are evidence of a secret large-scale spraying program. They call these imagined features "chemtrails".
