The California central valley is probably the best climate on Earth for growing almonds and that is why about 70% of the world almond production happens there. If we don't really need to grow them here, then one does not really need almonds at all. But what singular food item does the world really need?
I don't think the issue is that people are growing almonds in California or even that growing almonds in California takes a large amount of water. The issue as I understand it is that water rights in California (and everywhere else) are a mess and that there are no incentives that would allow water rights that are being used for relatively unproductive uses to be transferred to people using them for more productive uses.
> about 70% of the world almond production happens there
80% actually[0], and that only uses 8% of agricultural water in California. Given that dairy consumes 15% and only produces 1.4% of world yield (plus it can easily be done elsewhere), perhaps we should focus on that first.
