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MIT's prototype water harvesting device. Photo: Alina LaPotin

Researchers developed a workable, solar-powered device that can extract drinkable water directly from the air, even in desert regions.

Why it matters: If the technology can be made commercially viable, it could help alleviate water scarcity in some of the world's driest regions.

What's happening: Researchers at MIT and several other institutions published a paper earlier this week describing how they were able to significantly boost the output of a prototype water-harvesting device.

  • The original design harnessed temperature differences within the device to draw in moisture from the air at night and release it the next day. But its utility was limited because it required specialized and expensive materials called metal organic frameworks.
  • The new design adds a second stage and makes use of a more common material called zeolite, doubling its capacity to generate water.

Details: While other harvesting technologies that can draw water from fog or dew exist, they generally require humidity levels of at least 50%, if not much higher.

  • The new design, by contrast, can work with humidity levels as low as 20%, good enough to operate on an average day in a desert city like Phoenix.

The catch: Even the improved system can still only produce 0.8 liters of water per square meter per day, while humans need at least 2.5 liters per day to survive.

Go deeper

Former Michigan Gov. Rick Snyder charged in Flint water probe

Rick Snyder. Photo: Bill Pugliano/Getty Images

Former Michigan Gov. Rick Snyder (R) was charged with two counts of willful neglect of duty in an investigation into the Flint water crisis, according to Genessee County District Court records and multiple local reports on Wednesday.

Why it matters: Flint saw its drinking water contaminated with high levels of lead in 2014, spurring a public health disaster. The lead-contaminated water was blamed for an outbreak of Legionnaires disease that killed at least 12 people.

52 mins ago - World

U.S. and NATO answer Putin in writing while bracing for Ukraine invasion

NATO Secretary-General Jens Stoltenberg. Photo: Dursun Aydemir/Anadolu Agency via Getty

The U.S. and NATO provided Russia with written proposals on Wednesday to advance a "diplomatic path forward," even as they warned that Russia could invade Ukraine within days.

Why it matters: This is a delicate diplomatic balancing act. The U.S. and NATO want to show they're serious about diplomacy but unwilling to compromise on "core principles" — all without providing Vladimir Putin with an additional pretext for escalation.

The political leanings of the Supreme Court justices

Data: Martin-Quinn scores; Chart: Axios Visuals

The Supreme Court will continue to have a solid conservative majority even with Justice Stephen Breyer's retirement.

How to read the chart: An analysis by political scientists Andrew Martin and Kevin Quinn, known as the Martin-Quinn Score, places judges on an ideological spectrum. A lower score indicates a more liberal justice, whereas a higher score indicates a more conservative justice.