USE OF THE TOBACCO

Transformation of the tobacco 

The cured of the tobacco is a slow operation that should be watched over carefully to obtain color leaves, fading and very certain degree of dryness. Three methods are used (air, smoke and heat), each one of which it contributes to the leaf a characteristic aroma. The recently cured tobacco is bitter, and the one dedicated to manufacture cigarettes almost always dries off, it cools and rehidrata before storing it during two or three years. This way the leaf ferments and becomes softer and darker. In the image, an on-line controlled machine or computer transports rolls of tobacco in a factory of Carolina of the North (USA). 
 Uso of the tobacco 
Numerous medical studies have linked the consumption of tobacco with the lung cancer, the vascular affections of the heart, the emphysema and other illnesses; everything has taken it to many countries to finance intense campaigns guided to restrict the use and the sale of tobacco. In general, the consumption has diminished in occident, although it has increased among certain social groups, as the women of the countries of the south of Europe. A regulation of the GATT  it authorizes the countries signatories to consider the most important human health that the liberalization of the trade", but the international trade of tobacco continues growing to good rhythm. In the countries in development, the consumption increases yearly to reason of 2%. 
Scientific classification: the tobacco belongs to the family of the Solanaceaes. The species more cultivated, called bigger tobacco, is Nicotiana tabacum; the smallest tobacco is the species rustic Nicotiana