2. only about 9% of whom become addicted

2. Discussion of findings2.1.   Marijuana’s backgroundsCannabis is cultivatedcommercially or grows wild in warm and tropical areas all over the world. Thisplant, the material to make marijuana, has appeared for a long time, thescientists have found that the Chinese used cannabis seed as one of their foodsources. The National Institute of Drug Abuse (2017), a website of the USA’s government has defined thatmarijuana is the mixture of gray or green cannabis leaves, flowers, which hasbeen dried. According to the book “Cannabis: A History” of Martin and Booth, itis said that the term “marijuana” has derived from the name “Mary” and “Jane”,which are two common names in Mexico.

Marijuana is very popular in the US wherethe rate using this drug is three times higher than that global average, eventwo Presidents of this country, Thomas Jefferson and Geoge Washington, had hempplantations (Pappas, 2014). Budney et al. showed information that if comparedwith cocaine and heroin, the chance of users be addicted marijuana is thelowest with only about 9% of whom become addicted to it, while with thepercentage of people try cocaine and heroin is 15% and 24% respectively. In anarticle by Ferner and matt, the marijuana industry can become larger thanorganic food if the US Government allow this drug be traded legal.  2.2.   Advantages ofmarijuana.2.

2.1.  Marijuana canhelp prevent the cancer. Almost people thinkthat cancer,  a condition of uncontrolledcell division, is the unsecured diseases. Normally, when cells are old, mutatedor injured, the process of programmed cell death will set off to prevent thesecells from dividing and growing. However, cancer stops this process. The cancercells, which never die on their own even create a tumor that can influent onvital bodily functions. This but many scientists now have found thatmarijuana can help cancer sufferers.

There are about 113 kinds of cannabinoidsthat have been found in marijuana, they are the chemicals that make marijuanahave both medical and recreational properties. Among these cannabinoids,cannabidiol (CBD) and tetrahydrocannabinol (THC) are the most well-known andwell-understood. According to Anna Wilcox, the experiments in laboratories haveshown that programmed cell death can be triggered by CBD and THC. In addition, Wilcoxhas shown more that both of two cannabinoids in marijuana have anti proliferativeeffects. It means that CBD and THC kill cancer cells by halting their growth.

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Not only halting the proliferation of cancer cells, cannabis compounds alsohave anti-metastatic properties. The tumor will go through the bloodstream andlocate in any part of the body that make cancers be very difficult to cure. However,the spreading of tumor will be prevented by cannabinoids found in marijuana,THC and CBD.

Anna Wilcox, in his article “Does cannabis cure cancer” (2017),has told how cannabis can treat the cancer. Nevertheless, he also claimed thatthis plant cannot cure cancer totally, these are just experiments inlaboratories, but cancer patients should be more positive because of thesequite satisfactory results.2.2.

2. Marijuana can treat the GlaucomaGlaucoma is one kind of diseasesabout eyes which reduces people’s side vision, even leads to blindness. Thereason of this disease is related to the changing of intraocular pressure(IOP), it means that the pressure within the eyes is higher than normal.

Lowerthe IOP level is considered as the only way to control Glaucoma. If thecondition worsens, the patient should have an operation to curtail the pressureinside the eyes. Fortunately, in an article written by David Turbert, these aresome kind of drugs that can help treat this disease, one of which is marijuana.According to theauthor, the ideal use marijuana to cure Glaucoma has appeared since 1970s.National Eyes Institute supported this research, and the result is this thecannabinoids in marijuana, THC, are able to keep the IOP lowered. However, Turbertsaid that the effects of marijuana are short-term, just lasts three or fourhours. Therefore, patients have to use marijuana six to seven times a day. Itis can deny that marijuana really help to treat Glaucoma, but if smoking it tooregularly, it can lead to some bad effects for the health of the user.

2.3 Disadvantages ofmarijuana.2.

3.1 The effects ofmarijuana on the brainMarijuana which is oneof the strongest addictive substances in the world can lead to many bad effectson the user’s health. One of the consequences of using marijuana is on brain.

Accordingto the National Institute of Drug Abuse (NIDA) (2017), a website of the USA’sgovernment, there are many experiments, research on both animal and human aboutbad effects of marijuana on brain. In an experiment on animal, mice exposed tomarijuana in the early time of life, as soon as birth or during adolescence. Theresult showed that they are all change the function and structure in thehippocampus, a part of the brain. Another research shown by NIDA is about 4000youngsters who have used marijuana regularly during twenty five years. Whenexamined, they have had trouble with verbal memory tests. To support thisresult, the recent studies also show the relationship between using marijuanaand losing IQ. Teenagers (9 to 12 years old) and early adulthood (17 to 20years old) decreased significantly their verbal ability (about 4 IQ points),and when they stop using marijuana, they still cannot gain the points that theyhave lost. All of the researchesand experiments that NIDA has mentioned are the substantial evidence todemonstrate that marijuana is very harmful to the user’s health, especially totheir brain.

Both animal and human have troubles when they are exposed tomarijuana in any age. With rats, they find it very difficult to learn skills tosurvive in the nature. With human, when the adults use marijuana, they willlose their neurons in the hippocampus that leads them to not learn new thingsas easy as before.