›3rd International Symposium for Dark-sky Parks and 3rd International Dark-sky Camp
Light travells up to 200 km in the horizontal direction. Light crosses the borders of individual countries and regions, and therefore cooperation is needed. Much artificial skyglow could be avoided by stopping unused waste light from travelling at or just above the horizontal.
Why protected areas?
Protected areas are established and managed with a purpose of protecting and maintaining biological diversity, and natural and associated cultural resources; which must be effectively managed through legal and other means. Light pollution is a threat to the purpose of protected areas. Management of parks is therefore responsible to address it. Protected areas must identify processes that threaten their conservationist activities and must promote environmentally sound means to reduce them.