{
  "title": "Check my math: Atlantropa",
  "description": "Each step of the Atlantropa chain: formula, input, result, units, source number and URL, source type, whether we recomputed it, and its Seeing mark. Third-party values are single figures from CC BY reviews and US government pages, restated with the sources in each row. Values from Tanhua et al. 2013 are CC BY 3.0 and from Liu et al. 2025 CC BY 4.0.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "The What-If Observatory",
  "page": "https://whatifobservatory.com/what-if/atlantropa/",
  "derived_from": [
    "Tanhua et al. 2013",
    "Liu et al. 2025",
    "NIST SP 811",
    "US Energy Information Administration",
    "USGS Fact Sheet 2005-3024",
    "USGS Yellowstone Caldera Chronicles 2023",
    "US Census Bureau 2010"
  ],
  "method": "Compiled by The What-If Observatory from the data listed"
}