json_schema: {
    "properties": {
      "activities": {
        "description": "The activities contributing to carbon footprint",
        "items": {
          "type": "string"
        },
        "type": "array"
      },
      "energy_usage": {
        "properties": {
          "electricity": {
            "description": "The amount of electricity consumed in kilowatt-hours",
            "type": "number"
          },
          "natural_gas": {
            "description": "The amount of natural gas consumed in therms",
            "type": "number"
          }
        },
        "type": "object"
      }
    },
    "required": [
      "activities",
      "energy_usage"
    ],
    "type": "object"
  }