Which substance is primarily known for its use in smoking and can lead to serious health issues, including lung cancer?

Nicotine is primarily known for its use in smoking products, particularly tobacco. When individuals smoke cigarettes or other tobacco products, they inhale nicotine along with various harmful chemicals. This substance is highly addictive and is often linked to numerous serious health issues, including lung cancer, heart disease, and respiratory problems.

The health risks associated with nicotine and smoking stem from the tar and other carcinogens present in tobacco smoke, which can damage lung tissue and lead to cancerous growths over time. This makes nicotine a particularly significant public health concern. Understanding the impacts of nicotine is essential for grasping the broader context of addiction and the importance of smoking cessation programs.