Sun-cured tobacco, Bastam, Iran Curing and subsequent growing older let for that gradual oxidation and degradation of carotenoids in tobacco leaf. This makes specific compounds in the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes to the "smoothness" with the smoke. https://nmate68234.wikiworldstock.com/1330623/detailed_notes_on_smoking