It is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic
Footnote 2 PM originates either from natural sources such as fire, volcano eruption or pollen or from human activities such as cooking, heating, industries, traffic or smoking (see footnote 1)
The unique feature of this brand is that they use recessed filter paper which gives them a refined taste
The device was created by Stanford graduate students as part of their thesis
One to add to your list if you like a bit of cloud with your vape pen
Here is the number that matters: a thin carbon mat weighing 150-200g, which is what you find in most sub-$400 HEPA + carbon air purifiers, has a finite adsorption capacity measured in grams of pollutant