Sunset Over Mount Everest, Sagarmatha NP, Nepal
Feng Wei Photography—Getty Images/Flickr RF
By TIME Video
March 3, 2015

Climbers are leaving more than just their footprints when they traverse Mount Everest, especially when they need to “use the bathroom.” People leave behind large amounts of fecal matter and urine every year.

Watch the Know Right Now above to find out more, and read more here.

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