MIT Technology Review: How one climate scientist combats threats and misinformation from chemtrail conspiracists. “Though chemtrail theories have been repeatedly debunked, they’re surprisingly widespread. A study published in Nature found that up to 40 percent of Americans believe these theories are ‘completely’ or ‘somewhat’ true. Such “conspiratorial views” also accounted for around 60 percent of the conversation about geoengineering on social media. [David] Keith himself regularly receives hateful messages, and even threats of physical violence, as a result of his research. In an interview with MIT Technology Review, Keith says the widespread misinformation has already complicated his work and infected the public debate over geoengineering.”