Sun-cured tobacco, Bastam, Iran Curing and subsequent ageing allow for the gradual oxidation and degradation of carotenoids in tobacco leaf. This provides selected compounds during the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes to the "smoothness" from the smoke. The https://broadfar.com/nuso-heated-tobacco-smarter-alternative-to-traditional-smoking/