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One recent study, for example, found that children as young as 12 who had smaller orbitofrontal cortices were significantly more likely to start smoking weed by the time they hit their 16th birthday

Changing electrodes, breaking the crust that forms on top of the molten metal and cleaning out the "pots" are activities that create air pollution by tar volatiles including carcinogenic PAHs which, measured as benzo( a )pyrene, could reach a concentration of 800 g/m 3 /8 h (Bjorseth et al., 1978)

Cigarette capsules are small flavor carriers embedded in the filter

People who smoke marijuana were more likely to have certain types of lung damage than people who smoked cigarettes, according to a new study that reviewed lung scans of smokers

"Dick Van Dyke shares his secrets to longevity as he turns 100"