Parks Canada is an agency of the Government of Canada run by a chief executive who answers to the Minister of the Environment and Climate Change. Parks Canada is mandated to "protect and present nationally significant examples of Canada's natural and cultural heritage, and foster public understanding, appreciation, and enjoyment in ways that ensure their ecological and commemorative integrity for present and future generations". Parks Canada manages 48 National Parks, three National Marine Conservation Areas, 171 National Historic Sites, one National Urban Park, and one National Landmark. The agency also administers lands and waters set aside as potential national parklands, including eight National Park Reserves and one National Marine Conservation Area Reserve. More than 450,000 km2 (170,000 sq mi) of lands and waters in national parks and national marine conservation areas has been set aside for such purposes. Parks Canada Agency cooperatively manages a large majority of their protected areas and heritage sites with Indigenous partners. The Canadian Register of Historic Places is supported and managed by Parks Canada, in collaboration with provincial and territorial governments and other federal bodies. The agency is also the working arm of the national Historic Sites and Monuments Board, which recommends National Historic Sites, Events, and Persons.