#3 has way more ratings and way higher ones too:

I guess it could be lower because it's a series or something, but #10 is a movie, has a higher rating, and has more ratings too:

My only other idea of what "popularity" could mean is the page view count, but then it should probably be called something other than "top 10 on IMDb" IMHO.
European feudalism absolutely fucked up the environment tho. Europe used to be covered in beautiful lush forests, now it's mostly a patchwork of fields.