(Salem, OR)  --  Oregon lawmakers are considering legislation that could erase criminal charges for certain marijuana-related offenses.  The bills include one that could result in dropped charges for someone who was cited with possession of one ounce of pot or growing four plants in their home.  Measure 91, which goes into effect in July, makes those acts legal.  KATU-TV reports many prosecutors' offices have either dropped pending marijuana cases or stopped pursuing new charges since Measure 91 was approved.