Final answer:
Marijuana is considered a dangerous drug due to its negative health effects such as impaired memory and respiratory harm. It can also increase the risk of mental health issues.
Step-by-step explanation:
Marijuana is considered a dangerous drug due to its potential negative health effects. One of the main concerns is the psychoactive compound in marijuana called THC, which can impair memory, attention, and learning in heavy and long-term users. It can also affect motivation and increase the risk of mental health issues, especially in individuals with a predisposition to conditions like schizophrenia. Additionally, smoking marijuana can harm the respiratory system, similar to smoking tobacco.
Learn more about The dangers of marijuana use