Sunlight-cured tobacco, Bastam, Iran Curing and subsequent getting older let for that sluggish oxidation and degradation of carotenoids in tobacco leaf. This produces particular compounds inside the tobacco leaves and provides a sweet hay, tea, rose oil, or fruity aromatic taste that contributes to the "smoothness" from the smoke. https://broadfar.com/nuso-heated-tobacco-smarter-alternative-to-traditional-smoking/