【Smoking（is及harmful作文【高中高三900字】）】In today’s society, smoking has become a common phenomenon, especially among teenagers and young adults. Many people think that smoking can relieve stress or make them look more mature. However, the truth is that smoking is extremely harmful to both physical and mental health.

First of all, smoking causes serious health problems. The cigarette contains many toxic substances, such as nicotine, tar, and carbon monoxide. These substances can damage the lungs and increase the risk of lung cancer, heart disease, and other fatal illnesses. According to statistics, every year, millions of people around the world die from smoking-related diseases. Even if someone does not smoke directly, secondhand smoke can also be very dangerous for others, especially children and the elderly.

Secondly, smoking is not only bad for the body but also affects the mind. Nicotine in cigarettes is addictive, which makes it difficult for smokers to quit. Many people start smoking out of curiosity or peer pressure, but soon they find themselves trapped in a cycle of addiction. This can lead to anxiety, depression, and even a loss of self-control. Moreover, smoking can affect one's appearance, such as yellow teeth, bad breath, and premature aging, which may harm one's confidence and social life.

Additionally, smoking is a waste of money. A pack of cigarettes costs several dollars, and for a regular smoker, this amount can add up quickly over time. Instead of spending money on cigarettes, people could use it for education, travel, or other beneficial purposes. In the long run, quitting smoking not only saves money but also improves overall quality of life.

In conclusion, although some people may believe that smoking is harmless or even enjoyable, the reality is that it brings more harm than good. It damages health, weakens willpower, and wastes resources. As high school students, we should be aware of the dangers of smoking and make the right choices. Let us stay away from cigarettes and live a healthier, happier life.