What on Earth?

Publicly listed emails

podcasting@cbc.ca

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The seaweed invasion so big you can see it from space

October 17, 2026

Mountains of sargassum seaweed are choking Caribbean beaches. It’s so dangerous it’s shut down a school. Scientists point the finger at climate change, but solutions are on the horizon. We head to the tropics to learn about a WALL-E inspired robot vacuum and a seaweed-powered carGuests:Chuanmin Hu, oceanographer at the University of South FloridaMike Allen, professor at the University of Exeter and cofounder of marine robotics and clean technology company SeaGenLegena Henry, CEO and founder o...

Is Alberta separatism fueling Ottawa’s pipeline plans?

October 10, 2026

Alberta has the country on tenterhooks as the province votes on whether to consider splitting from Canada. At least one separatist leader says the threat to leave is serving as leverage for the oil industry. Others in the province say investment in renewable energy is already taking a hit.This week we’re asking how past fights over the oil sands got tangled up with separatism, what the referendum means for Alberta’s energy industry now, and what an independent Alberta would mean for the clima...

Can AI save the planet before it kills us all?

October 03, 2026

Depending on who you ask, AI could usher in a green utopia – or the apocalypse. Between those two extremes is a much less hypothetical reality: the technology’s huge impact on our environment now. But tech leaders like NVIDIA’s Jensen Huang suggest it's all worth it, because AI can solve climate problems in the future. So when it comes to emissions cuts, what’s AI done for us lately? And what’s at stake for the climate as more and more chatbots come online? Guest: Ketan Joshi, clima...

Climate Cast · Low booking difficulty · 1,000 - 10,000 listeners

How do I get in touch with What on Earth??

What on Earth? is hosted by Johanna Wagstaffe. Its publicly listed email is podcasting@cbc.ca. For guest bookings, the host or producer is usually the best person to reach. Podseeker helps you find direct host and producer contacts and pitch from your own inbox.

What is the email for What on Earth??

The publicly listed email for What on Earth?: podcasting@cbc.ca.

How many listeners does What on Earth? have?

Podseeker estimates What on Earth? reaches 1,000 to 10,000 listeners per episode. Only the publisher has exact numbers.

Who is an ideal guest for What on Earth??

What on Earth? typically books rising experts. Typical guest background: Established climate scientists, environmental researchers, policy experts, journalists, and professionals with direct experience addressing climate impacts or adaptation. Recent guests include Aaron Wherry, David Thurton, and Bill Merryfield.

How hard is it to get booked on What on Earth??

Medium. Guests usually need solid credentials in the topic and an idea that fits the show.

What topics does What on Earth? cover?

Recent episodes cover Science, Climate Change, Climate Adaptation, Extreme Weather, and Environmental Policy. Pitch an idea tied to one of these topics and mention a recent episode.