Engineers Attack Mt. Everest's 12-Ton Poop Problem

A new waste-to-energy system could help power a nearby Nepalese village

4 min read
Engineers Attack Mt. Everest's 12-Ton Poop Problem
Photo: John Harper/Corbis

For many amateur climbers, summiting Mount Everest represents one of life’s greatest challenges and achievements. But for the Nepalese and foreign professionals who work there, the larger challenge is figuring out how to keep the place clean.

Efforts to beautify what’s frequently called “the world’s highest garbage dump” have been under way for more than a decade, with mixed results. Spent oxygen canisters, empty beer bottles, and tattered tents recovered from the mountain can often be reused or recycled, but human waste is a messier problem. Each year, porters haul down some 12,000 kilograms of poop from base camps at Everest and the nearby Pumori, Lhotse, and Nuptse mountains. Getting the material off the mountain is one thing; however, properly disposing of it is another.

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Practical Power Beaming Gets Real

A century later, Nikola Tesla’s dream comes true

8 min read
This nighttime outdoor image, with city lights in the background, shows a narrow beam of light shining on a circular receiver that is positioned on the top of a pole.

A power-beaming system developed by PowerLight Technologies conveyed hundreds of watts of power during a 2019 demonstration at the Port of Seattle.

PowerLight Technologies
Yellow

Wires have a lot going for them when it comes to moving electric power around, but they have their drawbacks too. Who, after all, hasn’t tired of having to plug in and unplug their phone and other rechargeable gizmos? It’s a nuisance.

Wires also challenge electric utilities: These companies must take pains to boost the voltage they apply to their transmission cables to very high values to avoid dissipating most of the power along the way. And when it comes to powering public transportation, including electric trains and trams, wires need to be used in tandem with rolling or sliding contacts, which are troublesome to maintain, can spark, and in some settings will generate problematic contaminants.

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