Reality Sandwich, Nov. 2, 2010A new ranking system based on a multicriteria analysis reveals alcohol to be the most harmful drug, beyond even heroin and crack.
The system developed by Professor Nutt of Imperial College London uses the multicriteria decision analysis (MCDA) to look at nine criteria that reflects harm caused to the user, which includes mortality, mental impairment, and dependency, as well as seven criteria that reflects damage done to others such as crime, environmental damage, economic cost, and family conflict, clustering them into five subgroups that represent physical, psychological, and social harms.
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