Air is everywhere and is constantly moving around us and through us as we breathe, but it also carries alot of unwanted passengers. From pollen to pollutants we are continually filtering the air around us day and night. Just like the liver, our body's major liquid filter, we also need to cleanse the lungs from the dust and debris and industrial pollutants. Especially if you are exposed to cigarette smoke, candles, air fresheners, fumes from petrochemical agents like cleaning products, nail varnish, acetone, automotive maintenance or if you are sensitive to pollen. Luckily, nature has supplied us with several potent herbs to purge and protect our lungs.