Sun-cured tobacco, Bastam, Iran Curing and subsequent getting older permit for your gradual oxidation and degradation of carotenoids in tobacco leaf. This creates specific compounds within the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes for the "smoothness" from the smoke. https://andresncpbn.wikiparticularization.com/1376181/smoking_an_overview