Tourism involves travel away from one's home for purposes such as holidays, business, visiting friends and relatives, pilgrimages, or sporting events. It is a major global industry, employing more people than any other. The tourism industry comprises various components including accommodation, transportation, attractions, support services, food and beverage operations, and retail stores. New developments may include very large airplanes carrying hundreds of passengers, space tourism, underwater hotels, and more specialized accommodation types. Tourism benefits local economies and brings cultural exchange, but tourists' experiences depend on descriptions provided before their visits.