A worker mixes sugar with tobacco at a processing factory in Makassar, Indonesia's south Sulawesi province May 29, 2009. The World Health Organisation called on Tuesday for a global ban on smoking at work and in enclosed public places. The United Nations agency said a ban would help limit non-smokers' exposure to second-hand smoke, which can kill through heart disease and serious respiratory and cardiovascular illness. REUTERS/Yusuf Ahmad (INDONESIA SOCIETY HEALTH)