Sunshine-cured tobacco, Bastam, Iran Curing and subsequent growing old permit with the slow oxidation and degradation of carotenoids in tobacco leaf. This creates specified compounds inside the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes for the "smoothness" in the smoke. https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/