There's a commonly held belief that a seemingly well-adjusted teenager is a ticking time-bomb, a problem waiting to happen. Researchers now say the opposite appears to be true. Happy teens may be just that.
Smoking has a huge effect on virtually every part of your body.
In part, this is because there are so many chemicals in tobacco smoke (over 4,000) but it is also because breathing smoke deep into the lungs is a very effective way to deliver these chemicals into your body.
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