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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

In the fight to conserve tropical rainforests, here's a tool you don't often hear about,

orange peels, specifically 12,000 tons of them dumped on the land.

You don't normally associate waste disposal with biodiversity benefits, something that's good for the environment.

Tim Truer is an ecologist at Princeton University, and he's talking about a unique conservation story.

It started in the early 1990s when an orange juice producer called Del Oro set up shop near the Guantasta

Conservation Area in Costa Rica. It's a region that contains several national parks and a wildlife refuge.

Deloro needed somewhere to dump their orange peels, and the company also owned forested land,

abutting the park land, that it had no intention of cultivating. So a deal was struck. If Deloro

donated its forested land, it could dump orange peel waste on degraded pasture land within the conservation area.

A thousand dump trucks' worth of orange peels were scattered on the land in 1998.

And within about six months, the orange peels had been converted from orange fields into this kind of thick black, loamy soil,

kind of passing through this pretty gross stage in

between of kind of sludgy stuff filled with fly larvae.

The results of that influx of nutrient-rich organic material?

I couldn't even find the site the first time that I saw it.

He couldn't find it because over 16 years, the orange peel waste had sent the land on a journey

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