Keep in mind these requirements are distinct; you may go well over the 4,500 hours but still not meet the duration requirement if those hours were not spread over a three-year period. For example, assume you worked on two projects at the same time, over a two-year period.
Nicotine is the main ingredient of concern in smokeless tobacco. It is estimated that a normal, 30-minute dip of smokeless tobacco delivers the same amount of nicotine as 3-4 cigarettes. Nicotine affects the brain and central nervous system and changes neurotransmitters levels regulating mood, learning, alertness, and ability to concentrate.
Following is the list of long term effects of smoking that smoker can have throughout one's life: 1  Cancers (Smoking related cancers are: lung, mouth, throat, stomach, bladder, cervix and more). 2  Lung diseases. 3  Heart disease.4  Cardiovascular diseases. 5  Heart stroke.6  Circulatory problems.7  Ulcers. 8  Premature aging.ffects of Smoking. Before discussing over the effects of smoking we categorize them into two groups, short term effects of smoking and long term effects of smoking. Both short and long term effects are quite different. The smoking effects should not be overlooked as they are detrimental to your health.