The use of marijuana among high school students has decreased
significantly since the early 1990's.
a. true
b. false

The answer is False, letter B

Explanation:

 The use of marijuana among high school students has increasing year by year. In spite of the media shows all of the problems about its use, how this "natural drug" is danger for the health, tennagers, students and even adults are choosing to use this drug. This increase in use is due to several factors: to remain in the group of society; to maintain a status of a cool person, and thus not be excluded by society; because it is a "natural drug", there is a confusion of its use, as if it would be good for health and still cause benefit.

  According to differents datas and researchers about this use, marijuanna is more harmful to the body than using and smoking a lot of cigars day by day. This reason is that, even cigars is not health for our body, there is a filter inside it and when you smoke a marijuana cigars, you don't have this kind of filters.

 But, is not only the use of this drug is increasing among high school students since early 1990's. We have a lot of drugs that, taking marijuana as its basis and beginning, it gives in to other stronger drugs. That's the problem about our society in this sort of drugs.