The Dangers of Third-hand Smoke
Experts often say that tobacco exposure does not leave anyone without risk. When it comes to smoking, any efforts of moderation could hardly save you. If you are concerned about your health and that of the people around you, the only way to prevent causing more harm is to quit.
Tobacco smoke contains more than 250 toxic chemicals, many of which are carcinogenic (chemicals that cause cancer). These toxins remain present in the air after the smoker exhales. In fact, secondhand smoke is said to be more harmful than inhaled smoke.
A more recent study confirmed that tobacco contamination is no longer limited to what smoke is still visible in the air. Toxins linger hours after a cigarette is extinguished. This remaining hazard forms over time in carpets, clothes, sofas, curtain and other household materials that easily absorb such. Experts aptly call it as third-hand smoke. [Read the rest of this entry...]

Mainstream smoke comes from the smoke exhaled by a smoker while sidestream comes from the smoke emitted by a lighted tobacco product.