Answer:
Secondhand Smoke - Nonsmokers who are exposed to secondhand smoke at home or at work increase their risk of developing heart disease by 25–30%. Secondhand smoke increases the risk for stroke by 20−30%. Secondhand smoke exposure causes more than 8,000 deaths from stroke annually.
Thirdhand smoking - Inhaling nicotine and other toxic chemicals in cigarette smoke, either firsthand as a smoker or secondhand as a non-smoker, may cause illnesses like heart disease, stroke and lung cancer.
