Sunshine-cured tobacco, Bastam, Iran Curing and subsequent growing old allow for the gradual oxidation and degradation of carotenoids in tobacco leaf. This makes particular compounds inside the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic taste that contributes into the "smoothness" in the smoke. https://nerodirectory.com/listings13118321/helping-the-others-realize-the-advantages-of-tabacco