Patrick Moore, co-founder of Greenpeace and environmental activist, is no stranger to controversy around his work because he doesn't believe CO2 is responsible for climate change and in fact argues the gas is beneficial due to the nutrients it provides to plants (and he disagrees with his critics, who often label him a "climate change denier"). Moore is booked to deliver a keynote at the City of Regina's sustainability conference, to be held May 20-21, but after backlash on social media Mayor Michael Fougere asked organizers to reconsider his appearance. Moore joins Gormley to discuss the controversy.