outside the cities of Poland and affordable
Of course; and growing.
has for years now
Which is why Poland, one of the dirtiest and most polluted places in Europe, needs fewer coal fired heating systems.
Fortunately, cleaner tech is becoming more and more popular, to the annoyance of PiS who like the coal lobby.
Where I'm from, once the world centre of coal mining, it is very clean now and reducing coal use has made a real difference.