Canada is in the grip of the worst wildfires in recorded history. Blazes are devouring millions of acres of forest, forcing more than a hundred thousand people from their homes. Toxic smoke has blanketed cities across North America.

Why are wildfires getting more frequent and intense across the world?

Part of the reason is climate change, but part of it is also population growth and land management. The question is, what should we do about it? How can we stop wildfires?

Contributors: Mike Norton, Director General of the Canadian Forest Service Liz Goldman, World Resources Institute Jon Keeley, senior research scientist with the US Geological Survey and adjunct professor at the University of California Matt Oakley, fire investigation officer and wildfire officer, Surrey Fire and Rescue Service

Presented by Tanya Beckett Produced by Louise Clarke Researched by Anoushka Mutanda-Dougherty Edited by Tara McDermott Mixed by Kelly Young Production Co-ordinator Brenda Brown

(Wildfires at Lebel-sur-Quevillon in Quebec, Canada June 23 2023. Credit: Frederic Chouinard/Getty Images)