A reliable indicator of the air quality in offices, classrooms, or living rooms is the CO2 content. In fresh air, the concentration of carbon dioxide is around 400 ppm. This stands for “parts per ...

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Mercey Livingston is a health and wellness writer and certified Integrative Nutrition Health Coach. She's written about fitness and wellness for Well+Good, Women's Health, Business Insider, and ...

Retire your old mop and bucket. The top robot mops we've tested keep your floors squeaky clean with little effort on your part. I’m PCMag’s senior writer covering smart home and wearable devices. I’ve ...