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Science & Medicine

What On Earth

CBC

There are a lot of questions, ideas and emotions about climate change. Whether you feel scared, curious or overwhelmed, What On Earth hears you. Laura Lynch explores your experiences, grappl...

Episodes

20 of 431 episodes

These young Canadians are suing their country over climate

This week, Jo goes inside the courtroom as an historic climate lawsuit gets underway in Vancouver. Fifteen young Canadians have hauled the f...

00:25:11Oct 31, 2026

There’s a bat housing crisis and the solutions are adorable

Sixty-five bats dropped dead inside a home custom-built to protect them. What went wrong? For bat moms looking for a place to raise their pu...

00:25:11Oct 24, 2026

The seaweed invasion so big you can see it from space

Mountains of sargassum seaweed are choking Caribbean beaches. It’s so dangerous it’s shut down a school. Scientists point the finger at clim...

00:25:11Oct 17, 2026

Is Alberta separatism fueling Ottawa’s pipeline plans?

Alberta has the country on tenterhooks as the province votes on whether to consider splitting from Canada. At least one separatist leader sa...

00:25:10Oct 10, 2026

Can AI save the planet before it kills us all?

Depending on who you ask, AI could usher in a green utopia – or the apocalypse. Between those two extremes is a much less hypothetical reali...

00:25:11Oct 3, 2026

The weatherman who spoke the truth – and paid the price

When a meteorologist took a job in Iowa, he was excited to make his forecasts matter to viewers by bringing in climate impacts that were rel...

00:25:15Sep 26, 2026

There's a lot on Carney's plate. Is our climate plan cooked?

As parliament gets back in session, there’s a lot going on: a trade war, talk of Alberta separation, and international alliances being redra...

00:25:11Sep 19, 2026

Is this Super El Niño a peek into forever weather?

It’s gonna be a record-breaking few months of weather. A natural surge of warm ocean water is colliding with a planet hotter than at any poi...

00:25:11Sep 12, 2026

Introducing our new host, Johanna Wagstaffe

She's a CBC science journalist, meteorologist and seismologist. Now she’s taking the helm as the host of your favourite climate change podca...

00:02:43Sep 9, 2026

Heat killed his friend. Now his community is saving lives

Stephen Nelson tried to keep his friend Mario safe in the 2021 heat dome. But tragically, his friend died – in an old building that wasn’t d...

00:20:23Sep 5, 2026

More heat, more rats, more problems

From the best of What On Earth: A warmer world is great for rats. (Not so much for us). That’s why cities are seeing a climate-linked rise i...

00:28:15Sep 2, 2026

The disaster in Nepal as a ‘wake-up call from Mother Nature’

The search for survivors is underway after deadly flooding in Nepal and Tibet. But experts around the world are also unpacking what role cli...

00:26:32Aug 29, 2026

Bats are dying in wind turbines. Here’s how to stop it

From the best of What On Earth: Bats and wind turbines are both climate darlings. But after Cori Lausen saw a turbine reduce a bat to a "bla...

00:27:20Aug 26, 2026

Will Alberta data centres really curb their water use?

There was booing and calls of bullsh*t during a recent government town hall in Sturgeon County. It’s where tech giant Meta is building its l...

00:25:42Aug 22, 2026

Fed up with broken stuff? Join the Buy it for Life movement

From the best of What on Earth - Online communities are hunting for items that last. At #BI4L, members crowdsource reviews and recommendatio...

00:25:21Aug 19, 2026

Why wildfires have some people furious about fossil fuels

If you’ve breathed in smoke, or worse, had to flee your home this summer, you might be thinking more about our warming world. Grand Chief St...

00:28:22Aug 15, 2026

Want a climate-friendly burial? Mushrooms may be the answer!

It’s made of mycelium and hemp, it’s better for the earth and it’s now available in Canada. CBC’s Anand Ram introduces us to an American wom...

00:21:47Aug 12, 2026

A quick, low-cost DIY solution to improve indoor air quality

From the Best of What On Earth – Wildfire smoke has choked Canadians across the country this summer. Air purifiers are expensive, but there’...

00:25:34Aug 8, 2026

How to turn your climate gloom into action

From the best of What On Earth – You’ve got climate questions, Hannah Ritchie has answers. She’s “Clearing the Air” in her new book, drawing...

00:27:43Aug 5, 2026

What if your home could float when a flood hits?

Flood-prone communities are doing everything to keep water out. But as climate-fuelled storms become more severe, some architects say we nee...

00:23:19Aug 1, 2026