Sunlight-cured tobacco, Bastam, Iran Curing and subsequent growing old allow for for the gradual oxidation and degradation of carotenoids in tobacco leaf. This makes selected compounds while in the tobacco leaves and gives a sweet hay, tea, rose oil, or fruity aromatic flavor that contributes into the "smoothness" from https://nuso88888.blogolize.com/details-fiction-and-smoking-73092245