Sun-cured tobacco, Bastam, Iran Curing and subsequent getting older allow for the sluggish oxidation and degradation of carotenoids in tobacco leaf. This generates sure compounds inside the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic taste that contributes to the "smoothness" of your smoke. https://broadfar.com/heated-tobacco-shaping-a-safer-sustainable-smoking-future/