It’s 2026, Earth’s pop. is 8.3 billion people. I genuinely think we are going to be 2/3 this in ~5 years.

You think that 2.75 Billion people are going to die in the next 5 years?

Sorry - I can't get past that. It's possible I'd read an article that had this conclusion, as shocking as that would be - if it had a more credible bit of evidence than "I genuinely think". I also don't know what WHS is. I would normally google that if I wanted to be informed by the article, but yeah - I've already dismissed its contents as crazy and stopped being interested.

I'm being harsh, I apologise about that. Normally I'd have closed the tab and never thought about it again. But you're asking for criticism and appear to be new at this. As a reader of lots of articles, I approach them something like:

Is this plausible? No? Who is saying it? Some random on the Internet? What's their source? "Trust me bro"?

If you have bona fides on the topic, be clearer about what they are. If you have data to back your conclusion up, be clearer about that before you drop a bombshell like '3 Billion people are going to die in the next few years'.

From the bits I read/skimmed, you appear to be saying that present levels of food production are relying on artificial fertiliser, which in-turn relies on LNG to be produced. But you haven't made clear is what's changing, why this is a problem, why we can't use alternate fertiliser sources, what trends you are already seeing to demonstrate that you're not projecting everything.