Surprisingly, as little as 30 minutes of secondhand tobacco smoke is as bad for the blood vessels of your heart as actually smoking a pack a day of cigarettes!
This was one of the unspoken reasons why cities where trying to ban smoking in public places.
The good news is that 90% of the risk of heart disease that is attributable to tobacco is eliminated after being off cigarettes (or off secondhand smoke) for only 6 months.
