Well, if an event like this happens, even agriculturally self-sufficient countries won't be self-sufficient anymore. The only advantage we have compared to our

Well, if an event like this happens, even agriculturally self-sufficient countries won't be self-sufficient anymore. The only advantage we have compared to our ancestors 1500 years ago is that we could import food from the Southern Hemisphere (because the ash clouds will mostly stay in the hemisphere they are produced in). But still, there would be drastic food shortages everywhere...