Your Most Likely Scenario

[Scythe13]

Yellowstone is an interesting one. It's a situation that would be so catastrophic, it would likely cause a major oxygen deficiency, due to the reduction of light and therefore photosynthesis.

Even though we only use 20% (it might be 12%, but I can't remember. Pretty sure it's 20% though) of the oxygen we breath in, I'm not sure would could cope with an 80% reduction in free oxygen in the air.

It's a situation that I would be fascinated to know how to prepare for. If you have the time Nix, write up a post about the effects and how we could best prep for them. I know a pyroclastic surge would cause instant death (think Pompeii) but we are far enough away to not be damaged by that.

Genuinely, I'd love to see the effects it would have. So, if you have time to search for links and models of the effects, please do post them up.