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Stolen from Reddit
https://www.reddit.com/r/dataisbeautiful/comments/1ftmkwt/oc_foods_cost_vs_caloric_density/
But I loved it. Also this has Shrimp removed, because it was on the OG chart due to an error and this is an updated version.
EDIT: Here is one for protein! https://www.reddit.com/r/budgetfood/comments/1fp2ytb/foods_cost_per_gram_of_protein_vs_protein_density/#lightbox
I do it every year. Maybe, we don't have the same kind of walnuts but in my area walnut trees are common enough to go to the woods, find a place with a few trees and fill a 50L bag of nuts in an hour. Do it with two or three people, twice or thrice during the season and the whole extended family have enough walnut for regular consomption until the next automn. When dried properly the walnuts last up to 3 years in their shell. A bit less than 2 years shelled in an airtight box. You do a bunch of in fall and you break the rest progressively during the year, while watching TV.
Yes. Or some other species close to it. I usually forage tree types of walnuts but I don't know their names.
I once found a ornamental Juglans Nigra tree that my city have marked as "American walnut tree" and picked 10 or 15 nuts. It took me days just to open 3. It was tasty though.
Are these types of nuts sold in shops? In never saw anything but European walnuts and the taste and texture are very different.