The Xiaomi Particle Counter Is So Inaccurate It Should Not Control the Purifier

Tech companies love to talk about how automation, internet of things, and the connected house are going to make the machines we use every day more convenient. But does it work? Anyone who’s used Apple’s Siri or “talk to text” feature knows that the promises of technology sometimes fall short. Here’s the Xiaomi air purifier, […]

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Tesla’s “Bioweapon Defense Mode” Is As Effective As…A 2010 Mazda?

Tesla rolled out its “bioweapon defense mode” to lots of fanfare and media attention. Tesla went big: “Bioweapon Defense Mode is not a marketing statement, it is real. You can literally survive a military grade bio attack by sitting in your car.”     Elon’s telling the truth, but not the whole truth. Tests I’ve done […]

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What is the difference between PM2.5 and PM10 with respect to the atmospheric pollutants?

The difference between PM10 and PM2.5 is size. “PM” refers to particulate matter—particles in the air. Those particles are things like organic dust, airborne bacteria, construction dust, and coal particles from power plants (for example, check out this study from researchers in Shanghai who analyzed what those particles are really made of).   Now on to […]

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