I believe marijuana should not become legal. Studies show that the more marijuana you consume, will cause you to have a greater chance of receiving schizophrenia. Marijuana is a gateway drug. It is highly addictive and can be extremely harmful towards your body. Marijuana is extremely harmful to the developing brain and can cause severe damage. 45% of those who use marijuana took harder drugs. Many who use marijuana take it to feel better, but it actually can cause even more problems than what they had originally  started with. 20% of the people who have taken marijuana have become addicted to it. Allowing marijuana to become legal will cause more problems. Children and citizens will smell the fumes and it could be damaging to them. I believe legalizing the drug will just encourage users to abuse the privilege.  It will also put the public in danger. Users will cause self harm.

http://www.newhealthadvisor.com/Why-Marijuana-Should-Not-Be-Legalized.html

http://dailycaller.com/2012/07/19/why-we-shouldnt-legalize-marijuana/