The Maryland Senate has approved a medical marijuana bill on Monday by a vote of 42 to 4.


The bill passed on the last day of the legislative session.


The bill now heads to Gov. Martin O'Malley's desk. According to the Baltimore Sun, he is expected to sign the bill, having called the bill a "yellow light" approach toward medical marijuana. The AP reports the bill would create a state commission to oversee medical marijuana programs at academic medical research centers that decide to participate.


On March 8, Maryland's health secretary backed the legislation, noting the O'Malley administration had changed it's position on medical marijuana in the last year.


A national Pew Research Center poll released on April 4 shows the majority of Americans support pot legalization, by a margin of 52 percent to 45 percent.


This is a developing story.


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  • Alaska


    Legalized for medical use. <a href="http://www.flickr.com/photos/alanasise/6847095796/" target="_hplink">Flickr: alana sise</a>




  • Arizona


    Legalized for medical use. <a href="http://www.flickr.com/photos/billward/110338154/" target="_hplink">Flickr: Bill Ward's Brickpile</a>




  • California


    Legalized for medical use. <a href="http://www.flickr.com/photos/gerbache/2260207829/" target="_hplink">Flickr: gerbache</a>




  • Colorado


    Also legalized possession by non-medical users.

    <a href="http://www.flickr.com/photos/dok1/520845832/" target="_hplink">Flickr: dok1</a>




  • Connecticut


    Legalized for medical use.




  • District Of Columbia


    Legalized for medical use. <a href="http://www.flickr.com/photos/bigberto/2770838680/" target="_hplink">Flickr: ~MVI~ (off to coron)</a>




  • Delaware


    Legalized for medical use. Flickr: <a href="http://www.flickr.com/photos/dougtone/7749689644/">Doug Kerr</a>




  • Hawaii


    Legalized for medical use. <a href="http://www.flickr.com/photos/ricardo_mangual/6006230817/" target="_hplink">Flickr: Ricymar Fine Art Photography</a>




  • Maine


    Legalized for medical use. <a href="www.flickr.com/photos/indywriter/2683524563/" target="_hplink">Flickr: indywriter</a>




  • Massachusetts


    Passed ballot initiative for legalized medical marijuana in 2012.




  • Michigan


    Legalized for medical use. <a href="http://www.flickr.com/photos/kayoticblue/213316452/" target="_hplink">Flickr: ckay</a>




  • Montana


    Legalized for medical use. <a href="http://www.flickr.com/photos/csbarnhill/2633187564/" target="_hplink">Flickr: csbarnhill</a>




  • Nevada


    Legalized for medical use. <a href="http://www.flickr.com/photos/http2007/4699361533/" target="_hplink">Flickr: http2007</a>




  • New Jersey


    Legalized for medical use. <a href="http://www.flickr.com/photos/paulflannery/4021996652/" target="_hplink">Flickr: psflannery</a>




  • New Mexico


    Legalized for medical use. <a href="http://www.flickr.com/photos/everyskyline/3134662783/" target="_hplink">Flickr: michaelwhitney</a>




  • Oregon


    Legalized for medical use. <a href="http://www.flickr.com/photos/d-powell/2099638403/" target="_hplink">Flickr: digging90650</a>




  • Rhode Island


    Legalized for medical use. Also decriminalized possession of less than one ounce.




  • Vermont


    Legalized for medical use. <a href="http://www.flickr.com/photos/bryanalexander/6129117/" target="_hplink">Flickr: BryanAlexander</a>




  • Washington


    Legalized for medical use. Also legalized possession by non-medical users. <a href="http://www.flickr.com/photos/rose_braverman/6924724331/sizes/l/in/photostream/" target="_hplink">Flickr: Rose Braverman</a>