A US government agency has reported that about half of the Americans aged 12 years and older have started consuming alcohol:
http://newstonight.net/content/quarter-america-s-teenagers-are-drug-addicted
On preventing teen drinking:
http://www.fox10tv.com/dpp/studio10/healthy_living/preventing-underage-drinking
http://www2.macleans.ca/2011/09/19/who-should-teach-our-teenagers-about-drinking-at-university/
A recent program for teens who are depressed and abusing alcohol:
And recent research shows that more underage drinkers can be found in areas where alcohol is on sale:
and on the debate of whether to let your teen have parties with alcohol in your house, to keep an eye on things and keep them safe:
http://www.theprovince.com/life/Providing+booze+teenagers+just+plain+wrong/5843572/story.html