This DIY air purifier costs far less than a HEPA purifier, and studies say it works

The Corsi-Rosenthal Box is a DIY air purifier. Some are making theirs kid-friendly by adding unique design elements, while others are getting creative in how to transport them from office to class. (left: @roofeo24 on Twitter, right: James Andrew Smith) The Corsi-Rosenthal Box is a DIY air purifier. Some are making theirs kid-friendly by adding unique design elements, while others are getting creative in how to transport them from office to class. (left: @roofeo24 on Twitter, right: James Andrew Smith)

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Can Ukraine pay for war without wrecking its economy?

Even as Ukraine celebrates recent battlefield victories, its government faces a looming challenge on the financial front: how to pay the enormous cost of the war effort without triggering out-of-control price spikes for ordinary people or piling up debt that could hamper postwar reconstruction.

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