Second-hand or passive smoking is almost as dangerous as active smoking. According to WHO passive smoking causes 600000 deaths every year. Here are 10 facts you should know about about passive smoking: Second-hand smoke is the smoke that fills restaurants offices or other enclosed spaces when people burn tobacco products such as cigarettes bidis and water pipes. Everyone is exposed to its harmful effects. Guidelines to Article 8 of the WHO Framework Convention on Tobacco Control state that there is no safe level of exposure to tobacco smoke. Creating 100% smoke-free environments is the only way to protect people from