{
  "workload": "api",
  "user_base": "eu-west",
  "functional_unit": "1,000 successful HTTP requests",
  "selected_region": "europe-north1",
  "selected_location": "Finland",
  "selected_zone": "FI",
  "intensity_g_per_kwh": 29.84,
  "cfe": 0.98,
  "energy_kwh_per_1k": 0.0016,
  "sci_operational_g_per_1k": 0.047744,
  "sci_uncertainty_pct": 18.0,
  "embodied_g_per_1k": 0.004,
  "baseline_region": "europe-west4",
  "constraints": {
    "max_latency_ms": 80.0,
    "allowed_regions": null,
    "carbon_budget_g_per_1k": 0.35
  },
  "candidates": [
    {
      "region": "africa-south1",
      "location": "Johannesburg",
      "grid_zone": "ZA",
      "intensity": 641.42,
      "cfe": 0.15,
      "latency_ms": 165,
      "feasible": false,
      "rejection_reason": "latency 165ms exceeds 80ms budget",
      "sci_operational": null
    },
    {
      "region": "asia-east1",
      "location": "Taiwan",
      "grid_zone": "TW",
      "intensity": 427.95,
      "cfe": 0.15,
      "latency_ms": 260,
      "feasible": false,
      "rejection_reason": "latency 260ms exceeds 80ms budget",
      "sci_operational": null
    },
    {
      "region": "europe-north1",
      "location": "Finland",
      "grid_zone": "FI",
      "intensity": 29.84,
      "cfe": 0.98,
      "latency_ms": 32,
      "feasible": true,
      "rejection_reason": null,
      "sci_operational": 0.047744
    },
    {
      "region": "europe-west1",
      "location": "Belgium",
      "grid_zone": "BE",
      "intensity": 126.43,
      "cfe": 0.79,
      "latency_ms": 10,
      "feasible": true,
      "rejection_reason": null,
      "sci_operational": 0.202288
    },
    {
      "region": "europe-west10",
      "location": "Berlin",
      "grid_zone": "DE",
      "intensity": 275.81,
      "cfe": 0.7,
      "latency_ms": 12,
      "feasible": true,
      "rejection_reason": null,
      "sci_operational": 0.441296
    },
    {
      "region": "europe-west2",
      "location": "London",
      "grid_zone": "GB",
      "intensity": 109.39,
      "cfe": 0.75,
      "latency_ms": 14,
      "feasible": true,
      "rejection_reason": null,
      "sci_operational": 0.175024
    },
    {
      "region": "europe-west4",
      "location": "Eemshaven",
      "grid_zone": "NL",
      "intensity": 194.35,
      "cfe": 0.82,
      "latency_ms": 8,
      "feasible": true,
      "rejection_reason": null,
      "sci_operational": 0.31096
    },
    {
      "region": "southamerica-east1",
      "location": "S\u0101o Paulo",
      "grid_zone": "BR-CS",
      "intensity": 73.25,
      "cfe": 0.87,
      "latency_ms": 200,
      "feasible": false,
      "rejection_reason": "latency 200ms exceeds 80ms budget",
      "sci_operational": null
    },
    {
      "region": "us-central1",
      "location": "Iowa",
      "grid_zone": "US-MIDW-MISO",
      "intensity": 431.95,
      "cfe": 0.88,
      "latency_ms": 110,
      "feasible": false,
      "rejection_reason": "latency 110ms exceeds 80ms budget",
      "sci_operational": null
    },
    {
      "region": "us-east1",
      "location": "South Carolina",
      "grid_zone": "US-CAR-SC",
      "intensity": 579.44,
      "cfe": 0.31,
      "latency_ms": 95,
      "feasible": false,
      "rejection_reason": "latency 95ms exceeds 80ms budget",
      "sci_operational": null
    },
    {
      "region": "us-west1",
      "location": "Oregon",
      "grid_zone": "US-NW-BPAT",
      "intensity": 97.85,
      "cfe": 0.83,
      "latency_ms": 150,
      "feasible": false,
      "rejection_reason": "latency 150ms exceeds 80ms budget",
      "sci_operational": null
    }
  ],
  "source": "Google Cloud region carbon data 2025 (annual average, location-based grid intensity) - github.com/GoogleCloudPlatform/region-carbon-info",
  "dataset_year": 2025,
  "retrieved_at": "2026-10-25T01:56:14.155189+00:00",
  "decision_log": [
    "Evaluated 11 Google Cloud regions for workload 'api' (user base: eu-west).",
    "Constraints: max_latency=80ms, residency=any, carbon_budget=0.35 g/1k req.",
    "Selected europe-north1 (Finland, zone FI) at 29.84 gCO2e/kWh, CFE 98%.",
    "Carbon-unaware baseline (lowest latency): europe-west4 at 194.35 gCO2e/kWh.",
    "Rejected africa-south1: latency 165ms exceeds 80ms budget.",
    "Rejected asia-east1: latency 260ms exceeds 80ms budget.",
    "Rejected europe-west1: feasible but higher modeled SCI (0.20229 vs 0.04774 g/1k req).",
    "Rejected europe-west10: feasible but higher modeled SCI (0.44130 vs 0.04774 g/1k req).",
    "Rejected europe-west2: feasible but higher modeled SCI (0.17502 vs 0.04774 g/1k req).",
    "Rejected europe-west4: feasible but higher modeled SCI (0.31096 vs 0.04774 g/1k req).",
    "Rejected southamerica-east1: latency 200ms exceeds 80ms budget.",
    "Rejected us-central1: latency 110ms exceeds 80ms budget.",
    "Rejected us-east1: latency 95ms exceeds 80ms budget.",
    "Rejected us-west1: latency 150ms exceeds 80ms budget.",
    "Carbon gate passed: modeled operational SCI 0.04774 g/1k req <= budget 0.35."
  ],
  "incremental": {
    "baseline_region": "europe-west4",
    "baseline_rule": "lowest-latency feasible region (carbon-unaware)",
    "baseline_sci_operational_g_per_1k": 0.31096,
    "verdant_sci_operational_g_per_1k": 0.047744,
    "reduction_pct": 84.65,
    "uncertainty_pct": 18.0,
    "note": "Modeled incremental comparison. Same workload, same right-sizing and scale-to-zero in both scenarios; the delta comes only from choosing the lowest-carbon feasible region instead of the lowest-latency one. Uses annual-average location-based grid intensity, not marginal or real-time data."
  }
}