Mysterious simultaneous and well distributed FIRES in mexico are causing atmospheric disruption in the US central area.
last year was CA,and Canada on 2017.
https://en.wikipedia.org/wiki/Cloud_condensation_nuclei
https://worldview.earthdata.nasa.gov/?p=geographic&l=VIIRS_SNPP_CorrectedReflectance_TrueColor(hidden),MODIS_Aqua_CorrectedReflectance_TrueColor(hidden),MODIS_Terra_CorrectedReflectance_TrueColor,MODIS_Aqua_Aerosol(opacity=0.54,min=0.335,0.34),MODIS_Terra_Aerosol(opacity=0.50,min=0.355,0.36),Reference_Labels(hidden),Reference_Features(hidden),Coastlines&t=2019-05-22-T00%3A00%3A00Z&z=3&v=-119.7336546687662,20.98157867359607,-78.8117796687662,47.48939117359607