Question

secondhand smoke
mainstream smoke
sidestream smoke

air that has been contaminated by tobacco smoke

smoke exhaled from the lungs of a smoker

smoke from the burning end of a cigarette, pipe, or cigar

Answer 1

Secondhand smoke refers to the air that has been contaminated by tobacco smoke in the environment. It includes both mainstream smoke and sidestream smoke.

Mainstream smoke is the smoke exhaled from the lungs of a smoker. It consists of the toxins and chemicals that the smoker inhales into their lungs and then exhales into the surrounding air.

Sidestream smoke, on the other hand, is the smoke that comes from the burning end of a cigarette, pipe, or cigar. It is the smoke that is actively emitted from the tobacco product and enters the air. Sidestream smoke contains higher levels of harmful chemicals and toxins compared to mainstream smoke. Both mainstream and sidestream smoke contribute to the contamination of the air with tobacco smoke.