Carbon Intensity
Grid carbon intensity and low-carbon electricity share from NESO data.
Carbon intensity measures the grams of CO2 emitted per kilowatt-hour of electricity generated (gCO2/kWh). Lower values mean cleaner electricity. The UK's intensity has fallen dramatically due to coal phase-out and renewable growth.
Low-carbon electricity includes both renewables (wind, solar, hydro, biomass) and nuclear power. Together these provide the cleanest electricity and help reduce grid carbon intensity.
Grid Carbon Intensity
Daily average carbon intensity of UK electricity in grams CO2 per kWh. From NESO Historic Generation Mix.
Low-Carbon Share of Generation
Daily percentage of electricity from low-carbon sources (renewables + nuclear). From NESO Historic Generation Mix.
Source: National Energy System Operator (NESO) Historic Generation Mix dataset.
Update frequency: Daily averages from half-hourly grid data.
Carbon intensity calculation: Based on the generation mix and emission factors for each fuel type. Includes direct generation emissions only.
Typical values: UK carbon intensity typically ranges from 50-300 gCO2/kWh depending on the generation mix. Low values occur when wind is high; higher values when gas is needed to meet demand.