I can't remember the specific details to be perfectly honest , but i do recall reading that the design of the roof would be green , now if that was grass i missed that , but anybody that has a plastic roof on their shed or garden tool store will after a couple of years outside at some point...
Was the original plan to actually have the roof green in the first place to blend in with the countryside ? i thought i read that somewhere many moons ago before the stadium was even built .