The Zen air quality monitor is larger than the PurpleAir Touch (see below) but uses the same EPA AQI color scale: green for good air, yellow for moderate, orange for unhealthy for sensitive groups, red for unhealthy, purple for very unhealthy, and deep violet/maroon for hazardous
Since becoming available in 2007, the use of electronic cigarettes (e-cig) has increased dramatically in the US, however there are still very few studies that examine the long-term consequences of e-vapor, particularly in the context of appetite regulation or weight management [36]
Moisture can promote mold growth
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