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