Sun-cured tobacco, Bastam, Iran Curing and subsequent aging enable for the gradual oxidation and degradation of carotenoids in tobacco leaf. This provides selected compounds while in the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic taste that contributes to the "smoothness" from the smoke. https://nmate03578.pages10.com/not-known-facts-about-cigarettes-69404253