# What London's electricity is made of

> The generation mix behind every socket in the city, this half hour.

- Category: Environment
- Cadence: live
- Status: Live: values change continuously; cite the retrieval time.
- Dataset key: `live-carbon`
- Source: [National Grid ESO](https://carbonintensity.org.uk/)
- Licence: CC BY 4.0 — [terms](https://creativecommons.org/licenses/by/4.0/)
- Canonical page: [https://londongraph.com/g/what-londons-electricity-is-made-of](https://londongraph.com/g/what-londons-electricity-is-made-of)
- Machine-readable record: [https://londongraph.com/data/what-londons-electricity-is-made-of](https://londongraph.com/data/what-londons-electricity-is-made-of)

## Methodology

Forecast carbon intensity and generation mix for the London region from the National Grid ESO carbon intensity API, published per half-hour settlement period. The headline is grams of CO₂ per kilowatt-hour right now rather than a daily average — the whole point is that it swings with the wind.

## Visualisations

- [Overview](https://londongraph.com/g/what-londons-electricity-is-made-of): The generation mix behind every socket in the city, this half hour.
- [24-hour forecast](https://londongraph.com/g/what-londons-electricity-is-made-of?view=forecast): Follow forecast carbon intensity through the next 24 hours.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.