Olympics has also been a major influence on economic development. Concern was expressed that Vancouver's increasing homelessness problem may be exacerbated by the Olympics because owners of single room occupancy hotels, which house many of the city's lowest income residents, converted their properties in order to attract higher income residents and tourists. Another significant international event held in Vancouver, the 1986 World Exposition, received over 20 million visitors and added $3.7 billion to the Canadian economy. Some still-standing Vancouver landmarks, including the Sky Train public transit system and Canada Place, were built as part of the exposition
