keith richards smoking cigarettes A dazed looking of The Rolling Stones sits outside his Redlands home a cigarette after a fire gutted the house. August 1973 Stock Photo Time Is On His Side

Heavy marijuana users often say they have trouble thinking clearly, concentrating, and remembering things in the first one to three weeks after quitting

Provide annual training to staff and reminders to stores in school zones

It wasnt something she thought much about initially, but all of her friends smoked and she soon got caught up with the crowd

There are several resources to help someone quit smoking

Nature 332(6163):411415 Zhang JY et al (2006) Lipid-soluble smoke particles damage endothelial cells and reduce endothelium-dependent dilatation in rat and man

When you consume cannabis orally, your body processes the cannabinoids differently than with other methods, such as smoking