Another fun effect of less overall emissions growth from burning fossil fuel, whether due to decline in global economic activity or emissions target regulations

Another fun effect of less overall emissions growth from burning fossil fuel, whether due to decline in global economic activity or emissions target regulations, is a specific reduction in sulfur dioxide emissions. (Atmospheric SO2 has a cooling effect and, sort of, mitigates CO2 driven warming. One terraforming idea is to just increase atmospheric SO2, which obviously has problems of its own; see Venus...)