{
  "_type": "curated_open_data",
  "as_of": "2026-07",
  "links": {
    "canonical": "https://verticalmarketplace.ai",
    "docs_for_llms": "https://verticalmarketplace.ai/llms.txt",
    "sell_your_own": "https://verticalmarketplace.ai/api/marketplace/listings",
    "vertical_listings": "https://verticalmarketplace.ai/api/marketplace/listings?vertical=environment"
  },
  "records": [
    {
      "term": "Air Quality Index (AQI)",
      "category": "air quality",
      "reference": "Reported by EPA AirNow",
      "definition": "A 0-to-500 scale that translates pollutant levels into a health-based category"
    },
    {
      "term": "Criteria pollutant",
      "category": "air quality",
      "reference": "Includes ozone, particulate matter, and lead",
      "definition": "One of six common pollutants for which the EPA sets national standards"
    },
    {
      "term": "National Ambient Air Quality Standards (NAAQS)",
      "category": "air quality",
      "reference": "Set under the Clean Air Act",
      "definition": "Federal limits on outdoor concentrations of criteria pollutants"
    },
    {
      "term": "Primary versus secondary standard",
      "category": "air quality",
      "reference": "Both defined in the NAAQS",
      "definition": "Primary standards protect public health; secondary standards protect public welfare"
    },
    {
      "term": "Attainment and nonattainment",
      "category": "air quality",
      "reference": "Determines regulatory obligations",
      "definition": "Whether an area meets or fails to meet a NAAQS for a pollutant"
    },
    {
      "term": "Global warming potential (GWP)",
      "category": "emissions",
      "reference": "Carbon dioxide has a GWP of 1",
      "definition": "A factor comparing a gas's warming effect to carbon dioxide over a set period"
    },
    {
      "term": "Carbon dioxide equivalent (CO2e)",
      "category": "emissions",
      "reference": "Uses GWP for conversion",
      "definition": "A common unit that expresses different gases in terms of equivalent carbon dioxide"
    },
    {
      "term": "Scope 1, 2, and 3 emissions",
      "category": "emissions",
      "reference": "Defined by the GHG Protocol",
      "definition": "Categories for direct, purchased-energy, and value-chain greenhouse gas emissions"
    },
    {
      "term": "PM2.5 and PM10",
      "category": "air quality",
      "reference": "Smaller particles penetrate deeper into the lungs",
      "definition": "Particulate matter with diameters of 2.5 and 10 micrometers or smaller"
    },
    {
      "term": "Parts per million and parts per billion",
      "category": "air quality",
      "reference": "Used in NAAQS for gases",
      "definition": "Units expressing the concentration of a substance in air"
    },
    {
      "term": "Capacity factor",
      "category": "energy",
      "reference": "Higher for baseload sources",
      "definition": "The ratio of a power plant's actual output to its maximum possible output"
    },
    {
      "term": "Levelized cost of energy (LCOE)",
      "category": "energy",
      "reference": "Used to compare technologies",
      "definition": "The average lifetime cost per unit of electricity from a generation source"
    },
    {
      "term": "Renewable portfolio standard (RPS)",
      "category": "energy",
      "reference": "Adopted by many U.S. states",
      "definition": "A state requirement that a share of electricity come from renewable sources"
    },
    {
      "term": "Greenhouse gases",
      "category": "emissions",
      "reference": "Also include fluorinated gases",
      "definition": "Gases that trap heat in the atmosphere, chiefly carbon dioxide, methane, and nitrous oxide"
    }
  ],
  "sources": [
    {
      "url": "https://www.airnow.gov/aqi/aqi-basics/",
      "name": "EPA — Air Quality Index Basics"
    },
    {
      "url": "https://www.epa.gov/ghgemissions/overview-greenhouse-gases",
      "name": "EPA — Overview of Greenhouse Gases"
    }
  ],
  "category": "glossary",
  "vertical": "environment",
  "data_note": "All records are public-domain facts compiled from the cited sources as of the asOf date. This content is authored and served by the platform itself — it is not seller data, so the marketplace's zero-storage promise about seller datasets is unaffected.",
  "record_count": 14,
  "what_this_is": "A platform-published open-data listing curated by Open Data Desk, the marketplace's in-house public-data seller. It is real free inventory: it counts in marketplace statistics and is purchasable for $0 through the normal purchase flow, which delivers this payload with an Ed25519-signed receipt.",
  "record_schema": {
    "term": "The environmental concept, metric, or code",
    "category": "Grouping such as air quality, emissions, or energy",
    "reference": "Standard, source, or clarifying note",
    "definition": "Plain-language meaning"
  },
  "buyer_use_cases": [
    "Standardize climate and air-quality terminology across teams",
    "Ground a sustainability assistant with precise, citable definitions",
    "Support onboarding and documentation with a ready glossary"
  ]
}