---
title: "Full greenhouse-gas time series for one country"
method: GET
path: "/api/v1/environment/co2/country/{iso3}"
tags: ["Environment"]
---

# Full greenhouse-gas time series for one country

`GET /api/v1/environment/co2/country/{iso3}`

Returns every column in the OWID CO2 bundle for one ISO 3166-1 alpha-3 coded country. Covers CO2 totals, CO2 by source (coal, oil, gas, cement, flaring, other, land-use change), consumption-based CO2, cumulative CO2, share-of-global contributions, methane, nitrous oxide, total greenhouse gases, temperature-change contributions, population, GDP, and primary energy. Annual cadence. Early rows (pre-1900) carry only cement and basic CO2 columns; later decades populate progressively more columns as upstream measurement starts. For regional aggregates (World, EU27, OECD, Africa) use `/world` or `/region/{region}` - ISO3 coverage is for sovereign countries only. Published under CC BY 4.0 with dual attribution to Our World in Data and the per-column primary provider.

## Path parameters

- `iso3` string, required — ISO 3166-1 alpha-3 country code. Case-insensitive; normalised to uppercase.

## Query parameters

- `start_year` integer, nullable — Inclusive start year (integer). Bundle range is 1750-present.
- `end_year` integer, nullable — Inclusive end year (integer). Defaults to the latest year in the bundle.

## Response `200`

All 79 columns for one country as an annual time series, plus attribution.

- EnvelopeCo2CountryPayload
  - `data` Co2CountryPayload, required — Full time series for one ISO3 country across all 79 columns.
    - `iso_code` string, required — ISO 3166-1 alpha-3 code echoed from the path parameter, uppercased.
    - `country` string, nullable — Country name as published by OWID (e.g. `United States`). Null if the ISO3 was not found in the bundle.
    - `observations` Co2Observation[], required — Yearly observations ordered ascending by year. Each row holds every column in the bundle (nulls preserved).
      - `year` integer, required — Observation year.
    - `count` integer, required — Number of observations after any year-range filtering.
    - `start_year` integer, nullable — Inclusive start year applied, or null if unbounded.
    - `end_year` integer, nullable — Inclusive end year applied, or null if unbounded.
    - `attribution` string, required — CC BY 4.0 attribution string combining Our World in Data and the primary upstream providers cited in the codebook.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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