Roughly, the three funcions of protected natural areas are 1) conservation of natural resources (biodiversity, natural sites or monuments...), 2) sustainable development for local-regional areas, 3) environmental education. Lots of surveys have been made, and can be found in specialized literature, but I get difficulties to find only one that be oriented on that third so-important function. Do anyone know a specific tourists' survey on it? Or maybe a questionnaire for tourists or visitors with a specific part on how a natural protected area (e.g. a National Park) is being fulfilled? Thanks!