I don’t support marijuana which is legalized. There are a lot of reasons to explain it, so I want to talk about the reasons. First, marijuana can be make cancer. In 2005, a systematic review in the international Journal of cancer pooled the results of six case-control studies. No association was found between smoking marijuana and lung cancer. Second, it can be effect pregnancy. If babies born to women who smoke pot during pregnancy are more likely to be underweight, delivered premature and admitted to a neonatal intensive care unit. However there were no links seen for changes in birth length, head circumference or congenital malformations. Third, it also can be memory and concentration. Many studies, that learning, memory and attention can be impaired.