Hello, I am studying for my LEED Green Associate Exam. Under "Open Space" it states 25% of the 30% must be vegetated (turf grass does not count as vegetation). However, further down it states outdoor oopen space must be one of the following:

(1) A recreation-oriented paving turf with physical site lement that encourage physical acticity

(2) A pedestrian-oriented paving or turf area with physical site elements that ac comodate outdoor social activities

Can someone please help me understand why turf is included in both options?