There is growing evidence of a grave new and persistent global environmental public health threat that has gone unremarked in the scientific literature. Burning coal by electric utilities concentrates the impurities in fly ash", fine particles that used to go up the smokestack, but now are trapped because of their toxic environmental and public health hazards. In a recent article in International Journal of Environment Research and Public Health, geoscientist, J. Marvin Herndon presents "strong experimental evidence that coal fly ash is the aerosolized particulate sprayed in the troposphere by tanker-jets for geoengineering, weather-modification and climate-modification purposes." While university scientists talk about geoengineering as if it is some possible future activity, the reality is that geoengineering has been practiced throughout the 21st century, with full scale, near-daily operational activity since about 2013. Further, while the academics talk about placing substances in the upper atmosphere (stratosphere), where little mixing occurs, with "no public disclosure, no informed consent, and no public health warnings" the on-going geoengineering activities spray toxic coal fly ash into the lower atmosphere (troposphere) where it mixes with and pollutes the air we all breathe. Herndon discloses "the consequences on public health are profound, including exposure to a variety of toxic heavy metals, radioactive elements, and neurologically-implicated chemically mobile aluminium."