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