Hacker News Reader

https://ourworldindata.org/grapher/carbon-intensity-electric...

They mean the rate of reduction in the metric graphed above.

Why was Poland so high?

> The share gross electricity generation from coal in 2022 was 70.7%, (1.7 p.p. less than in 2021).

https://www.trade.gov/country-commercial-guides/poland-energ...

From that data, for the same reason as China: overdependence on coal.

I don't think it's a particularly cryptic measure.

The UKs peak carbon per kWh was at some point. Since then it's dropped at a percentage rate higher than anywhere else.

The biggest thing has been the elimination of coal even if it's with natural gas as it's a much cleaner fuel. It's still a fossil fuel, but burns with much less pollution.

It's the percentage cut in emissions relative to the 1990 bench line.