ok well there is only 1 way to truly find out: get this machine, its called a tetracronoglogical-ampapharic radiolator. its about $700 on ebay. stick it the ground then u wait 42 hours. if the second light on the left turns red then it is marijuana. if it turns green it isnt. carefull the machine can only be used 1 time. it might also give u cancer.