Secondhand smoke
Secondhand smoke is not nearly as dangerous as smoking directly, but it still can cause health problems. Secondhand smoke can cause eye irritation, headaches, and coughing. For people who have asthma, it can be very dangerous. Every year, 37,000 people die from heat disease caused by secondhand smoke, about 3,700 die from lung cancer caused by secondhand smoke,and 12,000 die from other forms of cancer.
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