@dan613@GreenFire@Andy_Scollick - the good analogy to using sulfates in very low concentrations to save the climate is medicines. Take warfarin for example: we take in low concentrations to prevent blood clots (despite some people dying as a side effect), while high concentrations cause internal bleeding and death (warfarin is used as rat poison).
The chart that you attached goes only to 2020. James Hansen is arguing, based on more recent data, that the impact of aerosols was underestimated.