Pot use in teens may cause poor memory and brain abnormalities, even years laterhttp://www.pbs.org/newshour/rundown/2013/12/heavy-marijuana-use-causes-poor-memory-and-abnormal-brain-structure-study-says.html?utm_source=facebook&utm_medium=pbsofficial&utm_campaign=newshour by hmsimha • 13 years ago 2 0 13 years agoPBpbs.org