In canada and US we grow so much corn to feed cattle and pigs, it’s so cheap that farmers have set up pellets stove that burn corn for heating.

So: kill the cows and the pigs, eat the meat and the feed.

I'm saying that if food production drops 30%, millions will die, not billions.

If both food production and oil production drop at the same time, then we're screwed.

Thus, we better get over our dependency of oil before the next food disaster hits.

(A volcanic winter would be quite bad for solar too. I don't know how fast we can scale fission in a disaster scenario, but I think it's our best hope. We should keep improving our fission tech too.)

A volcanic winter would only drop solar production 10% or so.