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​Overview on Smoking
Smoking is one of the biggest dangers facing humans nowadays. Smoking kills four million people every year and the number is expected to rise to ten million annual deaths in 2020. 
 
Tobacco use causes severe addiction; out of one hundred people that use tobacco, around 85 to 90 percent will become addicted to it. 
 
Nicotine in tobacco is the main cause for this addiction in tobacco users.