Long-term marijuana abuse has several negative impacts on the user, including:10 [6]
Links
[1] http://www.cesar.umd.edu/cesar/drugs/marijuana.asp
[2] http://rethinkpot.org/tags/history
[3] http://rethinkpot.org/tags/illegal
[4] http://rethinkpot.org/tags/ceasar
[5] http://rethinkpot.org/tags/long-term
[6] http://www.cesar.umd.edu/cesar/drugs/marijuana.asp#10