carcinogenic properties, the effects of paranoia in the long term, short term memory loss...basically im advocating that people should be aware of taking breaks. the same way that you have to learn disipline with any other kind of substance, whether alcohol or even over eating. im not sayin having a spliff is a detriment to ur health, but when uve been smoking it day in day out for 10 years, it does kinda start to mess with you.