Allergy season is getting longer and experts say climate change is to blam

Studies have found allergy season is getting longer and more intense, and experts are blaming climate change. To learn more about the amped up allergy season, Matt Galloway speaks with Cecilia Sierra Heredia, lecturer at the Faculty of Health Sciences at Simon Fraser University, and Anne Ellis, a professor of medicine and chair of the Division of Allergy and Immunology at Queen's University.