cigarette bud or but butts: how the no 1 most littered objects are choking our coasts | Environment Smoking doesn't just harm health—it

high schools and middle schools

"We ask, 'Do you feel addicted?' And they say no, but a series of questions on a validated scale for assessing loss of autonomy over nicotine show that they're dependent," said the study's lead author, Karma McKelvey, PhD, a postdoctoral scholar

Directional airflow (if applicable) Some activated carbon filters are directional , meaning they have a correct mouth side and smoke side. Others are not directional and can be used either way

Radon A radioactive gas, radon is a byproduct of uranium, thorium or radium breaking down in rocks, soil and groundwater, according to the EPA

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If we have to say so ourselves, cigarettes are a great equalizer