Landscape Colours need adjusting IMHO. I just saw pics from a BOB TV Program.

[Skoshi Tiger]

If you do a quick search on grass you probably find a few hundred pages of arguments about land scape colouring.

It will, most likely be broken down into
a) Grass is too green
b) grass is not green enough
c) Summer of 1940 was exceptionally hot and dry
d) various post from trolls.

I think after the first year or so of reading these arguments the developers looked elsewhere for authentic landscape colouring data, though I could be wrong.

cheers!