What is tobacco? What are the disadvantages?

Tobacco is a plant native to South America, and its leaves can be used to chew or make cigarettes for smoking. The earliest users of tobacco were American Indian reds. When European explorers arrived in the New World, the use of tobacco was quite common in the United States. /kloc-In the 6th century, tobacco was introduced to Europe and then spread all over the world. ?

Before the twentieth century, tobacco was mainly used by chewing, smelling, smoking pipes and cigars. /kloc-at the end of 0/9 century, cigarettes became the main form of tobacco use due to the invention of machines for making cigarettes.

It is generally believed that tobacco originated in America. Archaeological findings show that tobacco entered the lives of American residents when human beings were still in primitive society. At that time, when people were gathering food, they would unconsciously pick a plant leaf and put it in their mouth to chew. Because it is irritating, it just plays the role of restoring physical strength and refreshing, so they often pick it and chew it, which becomes a hobby.

The influence and harm of tobacco;

Tobacco is the largest preventable cause of death in the world today, and half of tobacco users will die from tobacco use. At present, the total number of smokers in the world exceeds one billion, accounting for about a quarter of the world population.

Tobacco use causes more than 5 million deaths worldwide every year. In developing countries, with the steady growth of population and the vigorous marketing measures of tobacco enterprises, the number of tobacco users continues to grow.

In addition, tobacco use will also bring huge economic losses to families and countries, including income loss, productivity decline, medical expenses increase and so on.