[vitally3643]

https://commons.wikimedia.org/wiki/File:Population_density_o...

Or are you talking about a different Poland?

People don't take up that much space and there is a strong tendency for populations to collapse into concentrated cities. In general, across the entire human species. All cultures and countries behave this way.

I think you've got plenty of free land.

[KptMarchewa]

Can you take a look at actual satellite map and tell me where all the unused land you apparently see is?

Pretty much all of the land in Poland is used - either for agriculture, forests or human settlements.

[dzhiurgis]

> Pretty much all

So like maybe 99%? Are you say it should be strictly 100% and none of it for solar?

You only need 1% of land for solar to sustain entire population.