I'm convinced there's a pareto distribution of crop water usage. We're depleting our aquifers to grow sileage crops and almonds (which aren't even that good).

Different things happen in different parts of the globe, and water is a fairly local issue.

You are right that me consuming almonds in Singapore can indirectly cause trouble in California, where they grow the almonds. But the well-known solution to that is proper water rights trading, like they do in Australia in water challenged areas.