evidence: The researchers found that there is a large amount of ‘spillover’ between geoengineering and conspiracy theories, especially around ‘chemtrails’, a conspiracy theory dating back to the 1990s. The researchers suggest that negative emotions related to geoengineering have a contagion effect, transcending regional boundaries and engaging with wider conspiracies. Their results are reported in the journal iScience. [...] "The chemtrail conspiracy theory is particularly popular among conspiracy theorists based in the United States, and our analysis found that tweets about chemtrails are the common link between geoengineering and conspiracies," said Debnath. "Most of these tweets are sent by American users, but they spill over across regional and national boundaries." [...] The researchers say that the common link between the chemtrails conspiracy and conspiracy theories around geoengineering is the idea that bad actors are ‘weaponising’ the weather with chemicals.