I have to say that, unless incontrovertible evidence is provided, I highly doubt chemtrails are valid. The fact of the matter is this: If there is continual dusting of crops, waterways and unsuspecting people, heavy metal testing would be spiking these materials.

I routinely have myself tested with DMSA heavy metal challenge which very effectively flushes heavy metals out of vital organs, excreted through urine. The 24 hour urine collection is tested. The last test showed very low levels of barium, cadmiun, chromium among others. Automobiles emit barium, too.

I would posit that this information was possibly an attempt to prevent healthful outdoor activities.