Sunshine-cured tobacco, Bastam, Iran Curing and subsequent getting older permit for the gradual oxidation and degradation of carotenoids in tobacco leaf. This provides sure compounds during the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes for the "smoothness" of the smoke. https://broadfar.com/non-combusted-cigarettes-a-safer-alternative-or-just-a-myth/