Secondhand smoke is cigarette, cigar, or pipe smoke that is inhaled unintentionally by nonsmokers. The amount of such smoke inhaled by a nonsmoker is relatively small when compared to the amount inhaled by a tobacco user; however, so-called passive smoking can aggravate respiratory illnesses and contribute to serious diseases, including cancer. This danger has led many countries to adopt smoking bans in indoor spaces. How has the tobacco industry responded to the issue of secondhand smoke? Discuss
Source: The Free Dictionary