Solar-cured tobacco, Bastam, Iran Curing and subsequent aging allow to the sluggish oxidation and degradation of carotenoids in tobacco leaf. This generates sure compounds while in the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic taste that contributes on the "smoothness" in the smoke. https://broadfar.com/non-combusted-cigarettes-a-safer-alternative-or-just-a-myth/