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Short Wave

This Huge Mining Pit Is About To Be A Lake

Short Wave

NPR

Daily News, Nature, Life Sciences, Astronomy, Science, News

4.76K Ratings

🗓️ 18 December 2024

⏱️ 16 minutes

🧾️ Download transcript

Summary

Old mines leave behind a a pressing problem: Huge holes that make the landscape look like a chunk of swiss cheese. But in Germany, some scientists and city planners are turning these into lakes.

The largest one will be the biggest artificial lake in Germany when it's done, with a shoreline of 26 kilometers or about 16 miles all around.

But it's not as easy as simply filling the holes with water. It takes a LOT of research to get this science right.

Interested in more environmental stories? Email us at [email protected]. We'd love to hear from you!

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Transcript

Click on a timestamp to play from that location

0:00.0

This message comes from Side Note by ASAP Science, a podcast about the science behind controversial subjects.

0:06.6

Is marijuana addictive? How will the universe end?

0:10.1

Hosts Mitch and Greg dissect a new topic every Wednesday on your favorite podcast app.

0:15.9

You're listening to Shortwave from NPR.

0:22.2

Hey, Shortwaivers, Emily Kwong here, and I am joined by Planet Money producer Willa Rubin.

0:27.4

Willa. Hey, what's up?

0:28.7

Hey, Emily. Hey, Shortwave. I come to you with a story.

0:33.2

All right, let's hear it.

0:34.1

So, about two hours southeast of Berlin, there's a city called Kotbus.

0:43.9

It's pretty small, about 100,000 people live there.

0:47.7

For context, this is in eastern Germany, near the Polish border.

0:51.9

And so historically, this part of Germany had a lot of lignite mining.

0:56.6

This is a fossil fuel that is dark brown, it's soft, it's kind of like an intermediate

1:01.0

between hard coal and petroleum coke.

1:04.1

Oh, interesting. I've never heard of this. Okay, lignite.

1:06.3

Yeah, lignite.

1:07.4

Then after the Berlin Wall fell in 1989, and Germany reunified East and West in the early 90s,

1:15.5

a lot of mines in the former East shut down, mostly for economic reasons, or they ran out of coal.

1:23.7

Then there was this pressing problem. There were a bunch of holes in the ground that used to be mines,

1:31.4

but now looked like a landscape of Swiss cheese, which is not awesome aesthetically or safety-wise.

1:41.1

And so the city of Kotbuss has a really interesting plan. And one sweltering day in September,

1:50.0

I went to go see one of these pits, 20 minutes east of the city.

...

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