 What else are they spraying? As John explains, they've done tests in Europe using mass spectrometry to analyze the residue that settles on cars and windows during periods of heavy chemtrail pollution. The results from Europe are disturbing to say the least. It's important to understand how toxic this stuff is. We're talking about graphene oxide, aluminum oxide, barium and mRNA. These are some of the most toxic metals in the universe. I have young children.