per capita -adj, adv. by or for each person

recreational vehicle-n. a large motor vehicle in which you can sleep and often cook

adapt-v. to change your behavior so that it is easier to live in a particular place or situation

flexible–adj. able to change or to do different things

static-adj. showing little or no change, action, or progress

ventilate-v. to allow fresh air to enter and move through (a room, building, etc.)

encourage-v. to talk or behave in a way that gives someone confidence to do something