Bulgaria
BGRNuclear overtook coal on Bulgaria's grid in 2023.
Today nuclear supplies 39% and coal 23%.
What this grid depends on
Three measures that say more about a country than how much power it makes. Open “what this means” on any of them if the term is new.
Cleaner than 7 in 10 grids worldwide.
What this means
How much planet-warming gas is released to make one unit of electricity. Two countries can generate exactly the same amount and one of them be ten times dirtier doing it. Lower is better.
Bulgaria generates a surplus and sells it on.
What this means
The share of what this country generates that is sold abroad rather than used at home. A country can only export if it produces more than it needs, which usually means plentiful hydro, nuclear or wind.
More of its fuel is bought in than produced at home.
What this means
How much of what this grid runs on the country can supply itself. Sun, wind and water count fully, because nobody can cut them off; coal, gas and oil only as far as the country digs them up. A high score is not the same as a good grid: mining your own coal scores well, importing uranium scores badly.
Also true of Bulgaria
Bulgaria has taken the carbon out of its electricity fast.
495 grams of CO2e a kilowatt-hour in 2015, 276 in 2025.
Bulgaria has no dominant fuel at all.
Its largest single source supplies just 39% of the grid.
Bulgaria is third in the EU for coal.
Coal supplies 23% of its electricity.
Bulgaria’s neighbours
SerbiaSerbia gets next to none of its electricity from solar, in a region built on it.
RomaniaRomania has cleaned up its grid faster than most people realise.
GreeceSolar overtook wind on Greece's grid in 2025.
North MacedoniaSolar overtook hydro on North Macedonia's grid in 2025.
TurkeyCoal overtook gas on Turkey's grid in 2022.
Figures are for 2025, the most recent year reported for Bulgaria. Generation shares are a percentage of electricity generated, not of energy used. How this is calculated.