> Tundra vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens.
So, they want to replace grassland with... grassland (maybe with less shrubs)?
To remove the layer of soil is easy but to make it appear again magically... not. You need thousands of years in some cases.
> Tundra vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens.
So, they want to replace grassland with... grassland (maybe with less shrubs)?