Marijuana activist and indoor grower Juan Vaz, head of the Uruguayan Cannabis Studies Association, checks the temperature in his indoor garden in Montevideo in this December 6, 2013 file photo. ... more 
Marijuana activist and indoor grower Juan Vaz, head of the Uruguayan Cannabis Studies Association, checks the temperature in his indoor garden in Montevideo in this December 6, 2013 file photo. REUTERS/Andres Stapff/Files less 
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Reuters | Photo By ANDRES STAPFF / Reuters
Fri, Dec 13, 2013 1:24 PM EST