People living in western countries are likely to quit alcohol in around two decades after they switch to a synthetic substance that mimics alcohol but does not harm people or cause hangovers, a British scientist has revealed. "Alcosynth" -- molecules, which mimic the pleasurable effects of alcohol but are not toxic, have the power to transform public health around the world, David Nutt, former drugs adviser to British government and Professor at the Imperial College London, was quoted as saying to IBTimes UK, earlier this week.