Let's Get to the Root of This

According to Steven Running, we're running out of plants and can't harvest much more because:

It's either locked up in root systems and unharvestable, conserved in national parks or wilderness areas crucial for biodiversity, or simply in far Siberia or the middle of the Amazon, where there are no roads and no way to harvest it.

Roots can't be used? How nice. I think I'll have a carrot.

I won't more than mention that we have not yet reached peak roads.