The climate is changing. So are we. On What On Earth, you’ll explore a world of solutions with host Laura Lynch and our team of journalists. In 1970, 20 million people showed up to fight for the environment on the first Earth Day. More than five decades later, is it time for this much tamer...

Johanna sets up two different, equally likely scenarios. First, The Big One: a 9.1 mega-thrust earthquake. Then, the lesser known 7.0 magnitude crustal quake which is shallow and strikes beneath the city of Vancouver. The outcome is catastrophic.