Solar-cured tobacco, Bastam, Iran Curing and subsequent growing older permit with the gradual oxidation and degradation of carotenoids in tobacco leaf. This makes particular compounds inside the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes on the "smoothness" from the smoke. https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/