At his final public event as host of CBC Radio Ideas, Paul Kennedy will moderate a discussion at the Glenn Gould Studio in Toronto about the impact of human activity on our planet and how we might be able to correct course. Guests will include Edward Burtynsky, one of the world's most accomplished contemporary photographers, Henry Lickers, a member of the Seneca Nation, Turtle Clan and the director of the Mohawk Council of Akwesasne’s Department of Environment, and Nadia Mykytczuk, an environmental microbiologist based at Laurentian University. For free tickets, please visit cbc.ca/ideas.