Bob Leeds, co-owner of Sea of Green Farms, shows some of the marijuana he produces during a tour of his growing operation in Seattle, Washington June 30, 2014. The state is poised on Monday to become the second after Colorado to allow retail sales of recreational marijuana to adults, under a heavily regulated and taxed system that voters approved in November 2012. Stores could begin operations as early as Tuesday, with up to 20 expected to open statewide. REUTERS/Jason Redmond (UNITED STATES - Tags: BUSINESS DRUGS SOCIETY)