SCIENTIFIC STUDIES

https://scitechdaily.com/common-environmental-pollutants-in-air-and-water-damage-our-mucus-structure-and-function/

https://onlinelibrary.wiley.com/doi/10.1111/all.15521

https://ww2.arb.ca.gov/resources/inhalable-particulate-matter-and-health

https://www.who.int/news/item/04-04-2022-billions-of-people-still-breathe-unhealthy-air-new-who-data

https://pubmed.ncbi.nlm.nih.gov/22463730/

https://health.clevelandclinic.org/mullein-benefits/

https://www.sciencedirect.com/science/article/pii/S0102695X13701261

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2576519/

https://www.medicinearticle.com/JMR_20206_14.pdf