Tobacco is the annual plant. Its roots are situated deep in the ground but the adult plant may achieve (in dependence on the sort and conditions) three meters in height.
Tobacco world

The modern society is divided into two parts: those who don't smoke and those who do smoke. And the second part increases rapidly. Since tobacco was brought to Europe from America, it became the favourite smoking substance.
People know about tobacco that it is the "relative" of potatoes and paprika since the first millennium b.c. Tobacco was given as the present to Christopher Columbus by natives from America. And since that time the popularity of tobacco only increased. At first some scientists of medieval times thought this plant was the universal medicine from all kinds of diseases. From the end of 16th century one Englishmen also claimed that smoking tobacco is the best that may be but he died from Cancer.
Soon philosophers of the world understood that smoking is very hard to quit. Mark Twain said that he gave up smoking several hundreds times and doesn't think it is the problem.
And only in 20th century the attitude to tobacco changed. And in the end of this century the problem of smoking tobacco became so important that isolation of smokers became real and necessary.
These two cases are two extreme measures. And only millions of smokers prove the popularity of tobacco nowadays. And these smokers are spread all over the world and the number of polices and laws as well as social isolation don't stop them from smoking and enjoying tobacco.
The attitude to tobacco is different and it changed during centuries. First it was the sign of prestige. Then it was the sign of commoner, later tobacco was divided into tobacco of good quality and bad quality. So, the attitude changed but it was always popular.
People created a great number of accessories that made tobacco even more popular, as in fact it became the part of fashion.
Nowadays the popularity of smoking is unlimited. And it is not bad for tobacco companies, but it is bad for the health of people that not only smoke but also for those who don't smoke.
There is no police that would allow or not smoking to definite categories of the population. It is prohibited to sale cigarettes to teens under 21 and 18 in some countries, but at the same time it doesn't prohibit teens to smoke. So the whole responsibility is put on parents of children.
To smoke or not – it is your decision.