I don't remember where I got the number, but a quick look at Wikipedia finds some claims that Free Germania used to have 70% forest area. I think I've also hear

I don't remember where I got the number, but a quick look at Wikipedia finds some claims that Free Germania used to have 70% forest area. I think I've also heard similar numbers in some museums given for Poland in Middle Ages. Can't find it now though. Sweden and Finland today have ~70%. 30% is the number for most of Europe today, and it's usually considered low, among the people I know. So it seems that Iceland historically already had very little forestation.