You couldn’t possibly find two variants which were harder to accurately derive.
You would have to figure out the land mass of each individual country on Earth, the amount of natural resources available to each individual country, decide how to draw boundaries in oceans to calculate how much fish belong to which country, take into account that fish, uh, swim and therefore ocean resources fluctuate...and that’s the tip of the iceberg (that the Captain of the Titanic probably scoffed at).
This difficulty in precise calculations means that for convenience purposes, figures are input into this formula using aggregated country datasets and as such Earth Overshoot Day becomes an approximation instead of being really precise.
Still, the data shows that humanity’s demand on nature is at an unsustainable level — one year is no longer enough to regenerate humanity’s annual demand on the planet.
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