why is tobacco harmful Smoking: Effects, Risks, Diseases, Quitting & Solutions Smokeless tobacco: Just an issue

So people may be addicted for more than a year before they feel the need to smoke a cigarette every day." Recognizing Addiction The most common reported symptom was a strong desire for a cigarette -- a good indicator, according to the study, that the student is likely to become a daily smoker -- even if the student was then only smoking monthly

Smoking is a leading cause of death and disease in the United States, but quitting smoking can be difficult

However, this is not the case

The gene codes for a sensor, or receptor, that is believed to be involved in detecting and responding to irritants from the environment in the lungs and airways