The document discusses the tobacco plant. It describes how tobacco originated in South America and is now grown in Europe. It details the harvesting process, where leaves are picked from bottom to top of the plant. There are 18 leaves harvested per plant. The leaves are then hung and dried, either in ovens or via air drying, to remove moisture and release flavors. The dried leaves are then chopped, flavored and mixed for cigarette production.

1. Tobacco plant
Be smart don’t start
3rd biotechnique Isma Arlon
(Loïc, Noé, Quentin, Justine, Mathis, Mathieu)

2. Tobacco plant
Vidéo:
https://www.youtube.com/watch?v=6Aqj14plb
HM

3. Tobacco plant
The crop
Tobacco is from South America.
Tobacco grows in Europe
Tobacco is from the same family as the
tomato

4. Tobacco plant
In 1550 tobacco seeds were brought to
Europe.
The first studies about the dangers of
cigarettes were made in 1950.
Each year 4 million people are killed by
tobacco.
119 countries produce tobacco (China

5. Tobacco plant
Drying and harvest
The leaves at the bottom of the plant are first
harvest, before the leaves at the top of the plant
There are eighteen used tobacco leaves per plant and the
upper one contains more nicotine
The leaves are harvest and then hung on large combs

6. Tobacco plant
There exist blond and brown tobacco.
Blond tobacco is dried in an oven and the brown one is air
dried
Drying is done immediatly after the harvest. The temperature
increases from 35 to 70° C to free aromas.The leaves
become brown.
Tobacco must be mixed because there are different qualities
and different vintages.

7. Tobacco plant
The recipe
Tobacco is moistened (sauced)
The leaves are chopped and flavorings are added.
Nicotine acts on the brain (the smoker becomes
dependent).
Smoke contains 5,000 different componants (tar, ...)
There are medications to quit smoking.

8. ?
Tobacco plant
1.Does your land produce tobacco?
2.Did you know that there are several kinds of
tobacco?
3.Did you know that the smoke contents more
than 5000 components?