All-time record
Greenest half-hour
The single cleanest half-hour ever recorded on the GB grid - carbon intensity bottoms out when wind, solar, nuclear and hydro crowd out gas.
The record
19 gCO₂/kWh
Set 2024-04-15 13:30:00 UTC
Recomputed from NESO's historic half-hourly data whenever new history is ingested. Eras a fuel wasn't tracked are excluded - never counted as zero.