The Huffington Post | By Matt Ferner

Cons of Legalizing Marijuana
One of the most commonly cited negative consequences of legalizing marijuana is the physical risks of the drug, both to those using it and to bystanders. Research has shown that marijuana can increase the likelihood of schizophrenia, mainly if the individual started smoking before the age of 18. There are also the health risks associated with smoking, including second-hand smoke for non-consumers, and the probability that driving under the influence of marijuana would be more common. It may also contribute to IQ declines when used by teens, according to a recent study.
Although legalization measures include age restrictions, like alcohol and tobacco, legalizing marijuana would make it considerably easier for children to get hold of. This is an obvious consequence of the increased and open availability of the substance, and the fact that marijuana is especially dangerous for adolescents makes this a much more serious consequence.
Some individuals also believe that it’s morally wrong to consume marijuana. The fact that people who take drugs are more likely to commit related crimes (such as theft to fund habit) also means that legalizing the drug could potentially lead to more criminals being out on the street. Drug use is another reason police can use to take law-breakers off the streets.
There is also a slippery slope argument, which states that the legalization of marijuana would eventually lead to the legalization of all illicit substances. The public could become desensitized to drug use and over time even crack cocaine and heroin could be purchased legally at dispensaries. Some people also argue that the drug is serves as a “gateway” to other, more harmful substances.

Pros of Legalizing Marijuana
The most prominent benefit of marijuana legalization in the current fiscal environment is the money it will generate in savings in law enforcement and money raised from taxation. A 2010 study from the Cato Institute estimated that the legalization of marijuana across the country would raise 8.7 billion annually. Like alcohol and tobacco, marijuana could become a regular, reliable source of tax revenue.
Many people also argue that marijuana is less dangerous than alcohol and tobacco. The relative safety of the drug after the age of 18 and the only psychological form of dependence it produces makes it objectively safer than the main legal drugs. If you drink enough alcohol, you will die, but there has never been a documented case of marijuana overdose. Likewise, taking too much aspirin, an extremely common medication, will kill you.
The drug also has medical uses which are accepted by many states. These include benefits for patients with glaucoma and those undergoing chemotherapy. There is also evidence that the drug can help with certain forms of cancer. The legalization of the drug would open these medical benefits up to patients with no regulation.
The police will also have more time to spend on more serious drugs with more potential for abuse. Instead of wasting time stopping the spread of plants which can be produced very inexpensively, law enforcement officers could focus on the manufacture of dangerous, synthetic drugs such as crystal meth. Likewise, the lack of a black market would drive prices down, so users would be much less likely to have to resort to crime to fuel their habit and individuals wouldn’t be funding gang activity or other criminals by purchasing marijuana.
Personal liberty is also a commonly cited reason to legalize marijuana. The individual who smokes marijuana only do so at risk to his or her self, assuming that they don’t expose non-smokers to the second-hand fumes. If the drug was eaten or taken in a vaporizer, the risks associated with smoking disappear entirely, and there is therefore no reason to restrict adults’ personal freedom. Compare marijuana to fast food; eating too much fast food will cause obesity if you don’t exercise, and that could easily lead to early death. Would it be fair to make fast food illegal too?