The Globe and Mail reports in its Wednesday edition that Canada will open up its four largest airports to private investment, Prime Minister Mark Carney told a gathering of global investors on Tuesday. A triple-bylined item led by Stephanie Levitz says the federal government is proposing that it will retain ownership of the underlying land and assets, but seek private investment through long-term agreements that will bring in new capital and expertise for airport operations and growth. Mr. Carney said the decision reflects a shift in how the country approaches investment, a message aimed at the hundreds of executives attending the Canada Investment Summit in Toronto this week. Canada's four largest airports are in Toronto, Vancouver, Montreal and Calgary. Mr. Carney said the capital raised will be invested in infrastructure, including regional airports, and will lead to an improved passenger experience. The PM later said he expects Ottawa will reap tens of billions of dollars from the move. The government currently delegates the management of airports to not-for-profit airport authorities through long-term ground leases. Airport authorities provide about half a billion dollars in annual revenue to Ottawa.