DENVER (AP) — The first batch of Denver businesses approved to sell recreational marijuana are getting their licenses.

The city is giving out licenses to the owners of 42 medical marijuana shops and growers Friday.

Denver is one of 19 municipalities and seven counties in Colorado that will allow retail sales of recreational pot to those 21 and older under voter-approved Amendment 64.

Only existing medical marijuana businesses in Denver are now allowed to make the transition to recreational sales. Of the 42 approved so far, eight are retail shops, 30 are growers and four are infused product manufacturers.

The state has approved 348 marijuana business licenses in Colorado.

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  • Marijuana Inmates Cost Prisons $1 Billion A Year

    Inmates incarcerated on marijuana-related charges cost U.S. prisons $1 billion annually, according to a 2007 study, <a href="http://www.alternet.org/rights/47815/" target="_hplink">AlterNet reports</a>.

  • Marijuana Prohibition Costs Taxpayers $41.8 Billion A Year

    Including lost tax revenues, a 2007 study found that enforcing the marijuana prohibition costs tax payers $41.8 billion annually, <a href="http://www.forbes.com/2007/09/29/marijuana-laws-work-biz-cx_qh_1001pot.html" target="_hplink">Forbes</a> reports.

  • California Marijuana Crop Worth $14 Billion A Year

    Marijuana growers account for <a href="http://www.time.com/time/nation/article/0,8599,1884956,00.html" target="_hplink">$14 billion a year in sales in California</a>, making it the state's most valuable cash crop, TIME reports.

  • Illegal Marijuana A $36 Billion A Year Industry

    It's estimated that <a href="http://madamenoire.com/106691/capitalizing-on-the-billion-dollar-marijuana-industry/" target="_hplink">illegal marijuana is a $36 billion industry</a> in the U.S., MadameNoire reports.

  • One-Third Of Americans Think Legalization Would Boost The Economy

    About one-third of Americans say they think <a href="http://www.huffingtonpost.com/2010/04/20/legalizing-pot-will-not-b_n_544526.html?" target="_hplink">legalizing marijuana would boost the economy</a>, according to a 2010 poll by Associated Press-CNBC.

  • Dispensary Ads Boost Newspapers' Revenue

    The <em>Sacramento News and Review</em> saw a big boost in ad revenue when it offered advertising space for more than 60 medical marijuana dispensaries, enabling the publication to hire three additional employees, <a href="http://www.news10.net/news/local/article/144285/2/Marijuana-ads-mean-big-money-for-weekly-newspaper" target="_hplink">according to News 10</a>.

  • Mendocino Zip Tie Program Raised $600,000

    Mendocino County, California's zip tie program aimed at regulating medical marijuana growing by charging permits for each plant raised <a href="http://www.huffingtonpost.com/2012/01/09/medical-marijuana-license-mendocino_n_1193198.html" target="_hplink">$600,000 in revenue in for the Sheriff's department</a> in 2011.

  • Oakland Raised More Than $1 Million In Marijuana Tax Revenue

    The city of Oakland, California raised $1.3 million in tax revenue from medical marijuana dispensaries in 2011, 3 percent of the city's total business tax revenue, according to <a href="http://www.nytimes.com/2012/02/12/us/cities-turn-to-a-crop-for-cash-medical-marijuana.html?_r=1" target="_hplink"><em>The New York Times</em></a>.

  • Colorado Pulls In $5 Million From Pot Sales Tax

    In 2011, Colorado pulled in $5 milllion in sales taxes from medical marijuana businesses, <a href="http://www.nytimes.com/2012/02/12/us/cities-turn-to-a-crop-for-cash-medical-marijuana.html?_r=1" target="_hplink"><em>The New York Times</em></a> reports.

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    When hydroponic marijuana growing supply chain weGrow opens a new store it <a href="http://aznow.biz/small-biz/wegrow-phoenix-opens-cultivates-opportunities-arizona)" target="_hplink">creates an estimated 75 jobs</a> indirectly, according to AZBusiness Magazine.

  • Majority Of States Support Taxing Marijuana

    More than <a href="http://www.huffingtonpost.com/2010/04/20/legalizing-pot-will-not-b_n_544526.html?" target="_hplink">60 percent of states agree with taxing marijuana</a>, according to a poll by Associated Press-CNBC.

  • Marijuana Affects Workplace Motivation

    A Norwegian study 25 years in the making came to the shocking conclusion that <a href="http://www.huffingtonpost.com/2012/02/24/marijuana-use-has-adverse-affect-workplace-motivation_n_1300278.html?" target="_hplink">frequent marijuana use lowers employees' motivation at work</a>.

  • More Than 1,000 Dispensaries In California

    There could be more than 1,000 medical marijuana dispensaries operating in California, <a href="http://www.pasadenaweekly.com/cms/story/detail/how_does_your_pot_grow/8070/" target="_hplink"><em>Pasadena Weekly</em></a> reported in 2009.

  • Denver Counts More Dispensaries Than Starbucks

    As of July 2011, the city of Denver <a href="http://www.huffingtonpost.com/2011/07/06/medical-marijuana-denver-starbucks_n_891796.html" target="_hplink">counted more medical marijuana dispensaries than Starbucks franchises</a>.