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"A Smart Home System That Respects Privacy ... new device from MIT’s Media Lab relies on passive carbon dioxide and infrared sensors"
https://spectrum.ieee.org/a-smart-home-system-that-is-accurate-and-respectful-of-privacy
"A Smart Home System That Respects Privacy ... new device from MIT’s Media Lab relies on passive carbon dioxide and infrared sensors"
https://spectrum.ieee.org/a-smart-home-system-that-is-accurate-and-respectful-of-privacy