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Short Wave

Micro forests: an emerging climate hero?

Short Wave

NPR

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

4.76K Ratings

🗓️ 7 January 2026

⏱️ 13 minutes

🧾️ Download transcript

Summary

Healthy forests help combat climate change, provide humans with drinking water and even improve mental and physical health. But it’s hard to imagine an entire forest in the middle of a big city. That’s where micro-forests come into play — public forests on a smaller scale, filled with native plants. They exist around the world, and producer Rachel Carlson went to visit the largest micro-forest in California. She joins host Emily Kwong to chat about what she saw. 

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Transcript

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0:00.0

Support for NPR, and the following message come from Yarl and Pamela Mohn, thanking the people who make public radio great every day and also those who listen.

0:10.6

You're listening to Shortwave from NPR.

0:16.1

Hey, shortwavers, Emily Kwong here, and today I have a treat for you.

0:19.5

We are going to a microforest.

0:22.5

If you've never heard of one, they are small, they are lush, and unlike natural forests,

0:27.3

micro forests are designed entirely by humans for urban environments. And producer Rachel Carlson

0:32.0

went to visit one in Los Angeles recently. Hey, Rachel. I did. Hey, it was amazing. I had the most fun day ever. I hung out with

0:40.3

two scientists who've dedicated themselves to planting these tiny forests to cool down cities and

0:45.8

make them more resilient to climate change. Okay, where did you go to see a microforest?

0:51.1

Ascot Hills Park, which is a park in northeast Los Angeles. It's surrounded by

0:55.3

freeways and interstates. It's not too far from the heart of downtown L.A. So it's not really an area

1:01.5

that I typically associate with lots of green space. But you pull off the freeway and drive this

1:07.2

way and you see a green stamp of 10,000 square feet. And that's exactly what

1:11.8

it looked like a green stamp. That's Damien Willett, an associate professor of biology at Loyola

1:16.9

Marymount University. He's one of the scientists I met with who's worked on planting and maintaining

1:21.9

this microforest for the last two years. Okay, but what makes a microforest a forest? In a forest, the canopies of the trees

1:29.1

touch one another. Well, you plant one tree, that's just a tree, but once you start having the

1:33.0

canopy connect, that starts to be what we imagine as a forest where we have this kind of blockage

1:38.4

of the sunlight, but also a forest has layers. Canopies of trees with layers of plants beneath

1:43.4

them. So in that way, a microforest

1:46.2

does simulate a natural forest. Okay. But what makes a micro forest micro? It's smaller?

1:53.6

Yeah. Oh. So this is not like a fairy forest with tiny plants or something. This is just a forest

...

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