The World Health Organization (WHO) signalled the urgent need for countries to make all indoor public places and workplaces 100% smoke-free with the release of its new policy recommendations on protection from exposure to second-hand tobacco smoke in adv

The World Health Organization (WHO) signalled the urgent need for countries to make all indoor public places and workplaces 100% smoke-free with the release of its new policy recommendations on protection from exposure to second-hand tobacco smoke in advance of World No Tobacco Day (31 May), which focuses this year on this theme. "The evidence is clear, there is no safe level of exposure to second-hand tobacco smoke," said the WHO Director-General Dr Margaret Chan. "Many countries have already taken action. I urge all countries that have not yet done so to take this immediate and important step to protect the health of all by passing laws requiring all indoor workplaces and public places to be 100% smoke-free." There are about 4000 known chemicals in tobacco smoke; more than 50 of them are known to cause cancer. Exposure to second-hand smoke causes heart disease and many serious respiratory and cardiovascular diseases that can lead to premature death in adults. It also causes diseases and worsens existing conditions, such as asthma, in children. The new WHO policy recommendations are based on the evidence of three recent major reports, which all reached the same conclusion: Monograph 83 Tobacco Smoke and Involuntary Smoking by the International Agency for Research on Cancer (IARC), the United States Surgeon General's Report on The Health Consequences of Involuntary Exposure to Tobacco Smoke and the California Environmental Protection Agency's Proposed Identification of Environmental Tobacco Smoke as a Toxic Air Contaminant. Exposure to second-hand smoke occurs anywhere smoking is permitted: homes, workplaces and other public places. An estimated 200 000 workers die each year due to exposure to smoke at work. WHO estimates that around 700 million children, or almost half of the world's children, breathe air polluted by tobacco smoke, particularly at home. The Global Youth Tobacco Survey, developed by WHO and the United States Centers for Disease Control and Prevention (CDC), interviewed students between 13 and 15 years old in 132 countries between 1999 and 2005. The results of the survey show that 43.9% of the students are exposed to second-hand tobacco smoke at home, while 55.8% are exposed to smoke in public places. Support for smoking bans in public places is global, with 76.1% of the students surveyed in favour. The costs of second-hand smoke are not limited to the burden of disease. Exposure also imposes economic costs on individuals, businesses and society as a whole. These include primarily direct and indirect medical costs, but also productivity losses. In addition, workplaces where smoking is permitted incur higher renovation and cleaning costs, and increased risk of fire, and may experience higher insurance premiums. Later this year, countries participating in the second Conference of the Parties to the WHO Framework Convention on Tobacco Control are expected to discuss guidelines for protection against exposure to second-hand tobacco smoke. The second Conference of the Parties, starts on June 30 in Bangkok, Thailand. "This topic should matter to everyone, because everyone benefits from smoke-free places," said Dr Douglas Bettcher, Acting Director of the WHO Tobacco Free Initiative. "With this year's theme, we hope that everyone, especially policy makers and employers, will be inspired to claim, create and enjoy spaces that are 100% free from tobacco smoke. By doing so, we keep the bodies inside those spaces smoke-free too, and greatly increase our effectiveness in preventing serious diseases and saving lives in future generations." Organizations, institutions and communities around the world celebrate World No Tobacco Day with different activities, for example marches, educational meetings and smoking cessation workshops, to raise awareness of the lethal health consequences of tobacco use and exposure to second-hand smoke. The day is also used to mark the beginning of extended media and advocacy campaigns or to introduce lasting policy changes, such as making public and workplaces 100% smoke-free. Tobacco use is the leading preventable cause of death globally, causing more than five million deaths a year. Tobacco use continues to expand most rapidly in the developing world, where currently half of tobacco-related deaths occur. By 2030, if current trends continue, 8 out of every 10 tobacco-related deaths will be in the developing world.

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