Sunshine-cured tobacco, Bastam, Iran Curing and subsequent ageing enable to the gradual oxidation and degradation of carotenoids in tobacco leaf. This creates specific compounds while in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes for the "smoothness" of the smoke. https://nmate04689.ltfblog.com/32602666/the-smart-trick-of-smoke-that-no-one-is-discussing