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Message: <blockquote data-quote="ozykolla" data-source="post: 31550298" data-attributes="member: 580942"><a href="https://onlinelibrary.wiley.com/doi/10.1002/sd.71358" target="_blank">https://onlinelibrary.wiley.com/doi/10.1002/sd.71358</a>පේපර් එකේ ලොජික් එක ලංකාවට දැම්මොත් ලංකාවේ ජනගහනය මිලියන 16ට අඩු කරන්න වෙනවා <img class="smilie smilie--emoji" loading="lazy" alt="🧑‍🔬" title="Scientist    :scientist:" src="https://cdn.jsdelivr.net/joypixels/assets/6.6/png/unicode/64/1f9d1-1f52c.png" data-shortname=":scientist:" />Step 1: Borrow the paper's underlying frameworkThe Keegan et al. paper argues sustainability = population size × per-capita consumption staying within what Earth can regenerate. I applied that same ecological footprint vs. biocapacity logic at the country level instead of globally.Step 2: Get Sri Lanka's two key numbersBiocapacity: how much productive land/sea Sri Lanka has, converted to "global hectares per person" — roughly 0.9–1.0 gha/personEcological footprint: how much Sri Lankans actually consume, in the same units — roughly 1.1–1.3 gha/personThese are the kind of figures the Global Footprint Network publishes annually; I was recalling approximate values, not pulling the live dataset.Step 3: Compare themFootprint > biocapacity means the country runs an ecological deficit — currently consuming ~15–25% more than its own land can regenerate.Step 4: Back-solve for a "self-sufficient" populationIf per-capita consumption stayed the same but population dropped enough that total demand = total domestic biocapacity, population would need to shrink by roughly that same 15–25%.22 million × (0.75 to 0.85) ≈ 16–19 million- Claude</blockquote>

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