Why smokers can cause lung damage in other people?

Smokers can cause lung damage in others through secondhand smoke, which contains thousands of harmful chemicals, including carcinogens and toxins. When smokers exhale, these harmful substances disperse into the air, where non-smokers can inhale them. This exposure can lead to respiratory issues, increased risk of lung cancer, and other serious health problems in non-smokers, particularly vulnerable populations like children and individuals with pre-existing health conditions. Additionally, the impact of secondhand smoke can accumulate over time, further exacerbating health risks.