Tear gas is a chemical agent commonly used for crowd control and self-defense. It causes temporary irritation to the eyes, skin, and respiratory system, leading to tearing, coughing, and difficulty breathing. The primary active ingredient is often CS gas, which is designed to disperse crowds and incapacitate individuals without causing permanent harm. While tear gas is frequently used by law enforcement during protests or riots, its use is controversial. Critics argue that it can cause severe health issues, especially for vulnerable populations like children and those with respiratory conditions. Additionally, its deployment can escalate tensions in already volatile situations.