Pubdate: Sun, 18 Aug 2013 Source: Province, The (CN BC) Copyright: 2013 Postmedia Network Inc. Contact: http://www2.canada.com/theprovince/letters.html Website: http://www.theprovince.com/ Details: http://www.mapinc.org/media/476 Author: Ted Cooper EXPOSURE UPS RISK The so-called gateway effect, which has it that marijuana use, particularly in adolescence, leads to the consumption of other, harder drugs is hotly contested. An addiction specialist said to me: "Show me an adult with a cocaine habit, and I'll show you someone who was 84 times as likely to have abused marijuana." Does everyone who smokes marijuana in adolescence go on to use cocaine? No, of course not, just as not everyone who goes in the water drowns. But with increased exposure and usage, the prevalence of substance dependence goes up. Ted Cooper Powell River - --- MAP posted-by: Jay Bergstrom