How do nicotine and tobacco cause cancer? by decreasing blood-sugar levels
by damaging or changing a cell's DNA
by increasing heart rate
by increasing phlegm and mucous production

The skills he need is to practice seeing and hearing

Answer in 2009 barack obama signed into law the family smoking prevention and tobacco control act, the new law (h.r.   1256) represents the most sweeping action taken to date to reduce what remains the leading preventable cause of death in the united states;