\" \" In October 2017, California experienced some of its worst wildfires in decades due to drought and climate change. David McNew/Getty ImagesAside from those who identify as climate change deniers, most of humankind is generally concerned about global warming. AdvertisementDr. Raymond Pierrehumbert, professor of physics at University of Oxford, is one of the leading scientists opposing geoengineering. Most scientists in favor of drastic measures agree there's no way to know how the planet will react to geoengineering. So what exactly are types of geoengineering that scientists are considering to avert a climate disaster?