This company has been slowly developing vertical wind trubines: https://windside.com/ https://windside.com/ They are not (yet) for mega installations, but sin

This company has been slowly developing vertical wind trubines: https://windside.com/ https://windside.com/ They are not (yet) for mega installations, but since they are almost silent and maintenance free they can be used both in urban areas and in sahara/antarctis where things just have to work.