evidence: ‘Controlling the weather’?: The limitations of the HAARP conspiracy theory [...] Still, some supporters of the theory believe there are HAARP devices hidden all over the world. They've even taken some videos out of context to convince others of the existence of this secret weapon. That's what happened with a video of an electrical installation in Brazil being torn down in 2017. Some said the installation was actually HAARP antennae. [...] But "geoengineering", or the process of modifying the climate on a much larger scale, is an avenue that is being studied more and more. For example, some scientists are working on ideas such as spraying particles into the sky to block sunlight to combat global warming, or modifying the trajectory of hurricanes, but they haven't had very convincing results to date.