"To be fair much of Scotland used to be covered in forestry and has been denuded. There are some interesting projects showing what happens if the land is simply

"To be fair much of Scotland used to be covered in forestry and has been denuded. There are some interesting projects showing what happens if the land is simply protected from over grazing (particularly by deer)." Interesting this popped up, as I'm studying an Ecosystem Restoration Design Course and the first week was studying exactly this, related Ted Talk here - https://www.youtube.com/watch?v=nAGHUkby2Is https://www.youtube.com/watch?v=nAGHUkby2Is But yes, overgrazing is the main culprit there (and also in a lot of other places that have suffered ecosystem collapse).