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Oct 28, 2022, 11:00 am160 pts
Ars Technica
Enlarge (credit: Reynold Andika Tinus / 500px) In 2008, the United States embassy in Beijing installed an air-quality monitor and started tweeting out its findings every hour. Since then, these monitors have popped up in more than 50 embassies in countries and cities around the globe. Something unexpected…
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