Relax, take a breath!  Ooops, hold on, should you really relax in taking a breath?  Every person breathes around 14,000 liters of gas every day, roughly over the volume of 42 thousand cans of coke.  Most of the air pollutants are invisible and you take them all and shelter them in the microscopic alveoli of your lungs.  Over the years, you have trapped layers and layers of ….  Give you lungs a break, let a reliable machine trap the pollutants like airborne particles, allergens, bacteria and viruses, odour, chemicals for you.