on the "Mission" page (same site as Phil's link)
http://www.emeraldnecklace.org/mission/ the text uses the verbs "protect, restore, maintain and promote" and Edward has got "promote" the same, but on the other hand the emphasis in the two texts is different -- in Phil's link (to which your text corresponds) the emphasis is on the "people" who care for the parks and in the "Mission" it's on the "parks" themselves as natural environments. I think the verb "enliven" which has been used in Phil's link is appropriate to the "people" aspect and I can't see any need to change the English as it stands.