Net-zero catastrophe beginning?

Historically, warm eras such as the Minoan Warm Period, Roman and Medieval Period were all where there was very little volcanic activity, with result that their atmospheres normally free of dimming SO2 aerosol emissions, This allowed world-wide temperatures to rise 2 4 degrees above current temperatures, causing droughts, famines, demise earlier cultures around world. Current Net-Zero activities banning burning fossil fuels emissions will have unintended consequence those eras.