Answer: Bad breath, yellow teeth, fatigue and decrease in energy.  And my Reduction in sense of taste and smell.  And it has been known to cause cancer.   My grandfather died 25 years after quitting smoking of small cell lung cancer.  So my advice is don’t ever start.  
Explanation:
 
        
                    
             
        
        
        
<em>This activity is an aerobic activity. This is known as aerobic because this consists of cardio exercises. During these activities, the heart rate and breathing rate will increase. These require free oxygen for a longer time.</em>
 
        
                    
             
        
        
        
Constant
Hope this helps!
:D