We use cookies to personalize content and ads, to provide social media features and to analyze our traffic. We also share information about your use of our site with our social media, advertising and analytics partners. Privacy PolicyAccept CookiesCookie SettingsSkip to main contentScientific American Cart 0Sign In |Stay Informed The SciencesMindHealth TechSustainabilityEducationVideoPodcastsBlogsStoreQuick and Dirty TipsChemistryWhat Are Chemtrails Made Of?Believers in chemtrails say those trails are actually clouds of chemicals used by the government for nefarious purposes. But as Carl Sagan says, “extraordinary claims require extraordinary proof” By Everyday Einstein Sabrina Stierwalt on September 22, 2018What Are Chemtrails Made Of?Credit: Vladimir Timofeev Getty ImagesIf you’ve never heard of chemtrails, don't fret. Before spending time in Southern California I hadn’t heard of them either. But whether it’s being in the land of obsession-with-healthy-living, or perhaps just being near a few major airports, I now hear about chemtrails quite frequently in SoCal.So what are chemtrails? Should we be worried about their effects on our health?What Are Chemtrails?Chemtrails, short for chemical trails, are what some call the white trails you see left behind as a plane passes overhead. Believers in the chemical aspect of chemtrails say those trails are actually clouds of chemicals used by the government or someother large scale entity for a variety of nefarious purposes from weather modification, to human population control via sterilization, to even mind control. The theories usually claim that normal jet plane output should dissipate quickly so any clouds that do not disappear immediately must be full of additional, undisclosed substances. Chemtrail theories are not only a U.S.-based phenomena—almost 17% of respondents in an international survey noted a belief in the existence of a "secret large scale atmospheric program" to be at least partly true.To address this concern, a group of 77 scientists published a report in the journal of Environmental Research Letters after digging through the supposed evidence of the intent to poison us through chemtrails. These scientists are experts in atmospheric science, including the contributions of aircraft to the atmosphere as well as atmospheric processes like how quickly or uniformly chemicals fall through the air to the ground. Of those 77 scientists, 76 said they found no evidence of a "secret large-scale atmospheric program"—that’s 98.7%. Instead, they found that "the data cited as evidence [for such a program] could be explained through other factors, including well-understood physics and chemistry associated with aircraft." In other words, the evidence pointed to the trails being simply the normally expected result of planes flying through the air.As for that one scientist? One scientist noted that in one remote location, the levels of barium in the atmosphere were unusually high relative to the levels of barium in the soil. No claims were made that the reason for those elevated levels had to be a large scale chemical operation, but since that scientist was not convinced of a clear reason for the barium to be higher in the atmosphere there, they left the possibility open.»Continue reading “What Are Chemtrails Made Of?” on QuickAndDirtyTips.comABOUT THE AUTHOR(S)Everyday Einstein Sabrina StierwaltSabrina Stierwalt, PhD, is an astrophysicist at the University of Virginia and the host of the Everyday Einstein podcast on Quick and Dirty Tips.Recent Articles How Can Science Help Reverse Blindness? Do Mosquitoes Bite Some People More Than Others? 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