{
  "updated_at": "2026-05-19T07:00:00Z",
  "date": "2026-05-19",
  "prices": {
    "eua_co2": {
      "label": "EU ETS CO2 Allowance",
      "icon": "CO2",
      "value": 78.42,
      "unit": "EUR/tonne",
      "source": "ICE EUA front-month future",
      "source_url": "https://ember-climate.org/data/data-tools/carbon-price-viewer/",
      "method": "live",
      "previous": 77.31,
      "change_abs": 1.11,
      "change_pct": 1.44
    },
    "saf": {
      "label": "Sustainable Aviation Fuel (SAF)",
      "icon": "SAF",
      "value": 2412.0,
      "unit": "USD/tonne",
      "source": "Derived: Jet A-1 x 3.0 (IATA / ICAO public guidance)",
      "source_url": "https://www.iata.org/en/programs/environment/sustainable-aviation-fuels/",
      "method": "derived",
      "previous": 2436.0,
      "change_abs": -24.0,
      "change_pct": -0.99
    },
    "green_h2": {
      "label": "Green Hydrogen",
      "icon": "H2",
      "value": 5.4,
      "unit": "USD/kg",
      "source": "IEA Global Hydrogen Review (range mid-point)",
      "source_url": "https://www.iea.org/reports/global-hydrogen-review-2024",
      "method": "reference",
      "previous": 5.5,
      "change_abs": -0.1,
      "change_pct": -1.82
    },
    "hvo": {
      "label": "HVO Renewable Diesel (Neste MY)",
      "icon": "HVO",
      "value": 1468.0,
      "unit": "USD/tonne",
      "source": "Argus NW Europe HVO Class II reference",
      "source_url": "https://www.neste.com/investors",
      "method": "fallback",
      "previous": 1445.0,
      "change_abs": 23.0,
      "change_pct": 1.59
    },
    "jet_a1": {
      "label": "Jet A-1 (fossil)",
      "icon": "JET",
      "value": 804.0,
      "unit": "USD/tonne",
      "source": "IATA Jet Fuel Price Monitor",
      "source_url": "https://www.iata.org/en/publications/economics/fuel-monitor/",
      "method": "live",
      "previous": 812.0,
      "change_abs": -8.0,
      "change_pct": -0.99
    }
  },
  "notes": "Live values are scraped from public sources at run time. Fallback / reference / derived values are used when a public daily spot price is unavailable. Always check the linked source for the authoritative quote before transacting."
}