Sunlight-cured tobacco, Bastam, Iran Curing and subsequent growing older allow for that gradual oxidation and degradation of carotenoids in tobacco leaf. This generates specified compounds within the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic taste that contributes for the "smoothness" from the smoke. https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/