"We need societies that recognise diversity as a source of strength," Canada's Prime Minister Justin Trudeau has said in a speech at the World Economic Forum, in Davos. <br />He also said that political leadership was about ensuring growth that "produces tangible results for everyone". <br />Mr Trudeau is in Davos to help promote Canada as a place to invest. Canada has been hit by low global oil prices, with the Canadian dollar falling to a 12-year-low against the US dollar.
