Answer for question 3 and 4

*How do you know that marijuana is effective to some diseases?
Dr. Sue Sisley noticed an unexpected trend among her patients. The psychiatrist works with veterans who struggle with post-traumatic stress disorder, also known as PTSD. Some of these patients felt better and better after using the marijuana plant. Most marijuana studies focus on the harm caused by the plant. The studies on its medicinal qualities are small.
Here are 10 disease that can be healed by the medical marijuana. AIDS, Alzheimer's, Arthritis, Asthma, Cancer, Chronic pain, Crohn's disease,Epilepsy, Glaucoma, and Multiple sclerosis. These diseases will be effective because they made an experiment and found out that it will be healed.

*How many cases were there in the past that were medicated by marijuana?
There are a lot of countries that uses marijuana for the medical use and succeeded on medicating some of the diseases. However, from country to country the law of using it is different. In Africa, most of the countries are fined for posing it, but it is rarely caught. Some countries in Africa only allow marijuana for the medical use. In Australia, the huge cultivation cite of marijuana, it is only good to export marijuana to other countries. In Canada, recently they had made a law that says you can grow marijuana at home if you have a license.
works cited
10 diseases where medical marijuana could have impact. (2015). Retrieved June 26, 2016, from http://edition.cnn.com/2015/04/15/health/marijuana-medical-advances

Is Marijuana Medicine? (n.d.). Retrieved July 09, 2016, from https://www.drugabuse.gov/publications/drugfacts/marijuana-medicine

Feature, A. H. (n.d.). Medical Marijuana Treatment Uses and How It Works. Retrieved June 26, 2016, from http://www.webmd.com/pain-management/features/medical-marijuana-uses

Veterinary marijuana? (n.d.). Retrieved July 09, 2016, from https://www.avma.org/news/javmanews/pages/130615a.aspx

Answer for the question 1 and 2

How many states legalize marijuana?
25 states and the District of Columbia currently have laws legalizing marijuana in some form. Some form means that for the recreational and the medical use. Recreational means to have fun using it,and medical means it is used for the medicine to cure some diseases. 4 states and the District of Columbia have legalized marijuana for recreational use. The other 21 states have legalized marijuana for the medical use. As we can see from this data that half of the US citizens uses marijuana for some kind. There are,of course, some laws referring to marijuana,such as limiting the use of it and limiting the amount of possessions.
Nevada could become the fifth state to legalize marijuana for recreational use when voters consider a ballot initiative later this year. Also,in April, Pennsylvania become the latest state to legalize medical marijuana.

How many countries legalize marijuana?
If you say a country, there are so much that we cannot explain it all,so we would like to introduce some of the countries. As we said before, the US has legalized marijuana on half of the country. The other example for legalization on marijuana recently is Colombia, which legalized it medically in December. This move is for the economic benefit for the country. For the US,the potential revenue from legal marijuana would be huge, at least for the United States, which could rake in more than $120 billion a year. To list a few more, there are Canada,Netherlands,Czech,France,Uruguay,and Romania. There are rule for each individual countries,such as you can only sell marijuana if you are a doctor,or you can only smoke marijuana in the coffee shops and so on.

works cited
State Marijuana Laws Map. (2016). Retrieved June 22, 2016, from http://www.governing.com/gov-data/state-marijuana-laws-map-medical-recreational.html

DeMaria, M. (n.d.). These Are All The States That Have Legalized Weed. Retrieved July 09, 2016, from http://www.refinery29.com/2016/04/107985/where-is-weed-legal

Here are the Countries Where Marijuana Is Legal in Some Form. (2016). Retrieved June 22, 2016, from https://www.yahoo.com/news/countries-where-marijuana-legal-form-193400717.html?ref=gs

New Health Guide. (n.d.). Retrieved July 09, 2016, from http://www.newhealthguide.org/Where-Is-Marijuana-Legal.html

Same news from 3 other articles

Mexico easing up on marijuana laws. (2016). Retrieved June 13, 2016, from http://edition.cnn.com/2016/04/19/americas/mexico-marijuana-laws/index.html

Agren, D. (2016). Mexico's president proposes legalising medical marijuana. Retrieved June 13, 2016, from https://www.theguardian.com/world/2016/apr/21/mexico-president-proposes-legal-medical-marijuana

Mexico's president says he is open to legalizing medical marijuana. (2016). Retrieved June 13, 2016, from http://www.reuters.com/article/us-un-drugs-mexico-idUSKCN0XG2KE

15 Questions about marijuana from Ryoma?

*How many states legalize marijuana?

*How many countries legalize marijuana?

*How do you know that marijuana is effective to some diseases?

*How many cases were there in the past that were medicated by marijuana?

*Does using Marijuana lead to other drugs?

*What are the dangers of using marijuana?

*What are the trends in marijuana use in the United States?

*Couldn’t legalizing and taxing marijuana generate significant revenue?

*If there is no bad effects, why don’t they legalize marijuana?

*What do you mean by recreational use of marijuana?

*Why do you need a license to make a marijuana business?

*Can smoking marijuana while pregnant harm an unborn baby?

*Is there a hospital that use marijuana secretly?

*Do physicians legally prescribe marijuana?

*Is there a risk on using medical marijuana?

Current understanding of marijuana

Our current understanding of marijuana are that it is no more harm than tobacco, and it gives rise to the medical relieves. Firstly, it is also no more addictive than alcohol and tobaccos, although it is considered to be a gateway towards other drugs such as cocaine. Secondly, in fact, in America 13 states allow marijuana for the medical use. Shown in the picture below. These are the facts that we know.

I’m Earl Henslin, the child counselor with the Christian counseling group Henslin and Associates in Brea, California Firstly, I think there are two points of view about marijuana. One is that of all the illicit drugs, and of all the intoxicants including alcohol, marijuana is probably the least dangerous on a number of dimensions. The other viewpoint is that marijuana is the illicit drug most likely to be used by juveniles, and that it is a much more dangerous drug than many people believe. It also can be the gateway drugs. Meaning it will be the entrance to some other drugs like cocaine. I would like to say that this issue is not good for these reasons.
1.Long-term marijuana use leads to structural changes in the brain. One study showed marijuana users was inversely correlated with cumulative exposure to the drug in the left, but not in the right, hemisphere of the brain.

2.The adverse effects of smoked marijuana on the respiratory system are outweighing the potential benefits. In fact, marijuana smoke contains 50 to 70 percent more carcinogenic hydrocarbons than tobacco smoke.

3.some potentially serious side effects were noted, including an increased heart rate and a decrease in blood pressure in studies using smoked marijuana

Works Cited

Medical Marijuana Pros and Cons: Expert Opinions. (2013). Retrieved June 01, 2016, from http://thesurvivaldoctor.com/2013/02/14/ medical-marijuana-pros-and-cons-doctors-debate-opinions/

Interviews (n.d.) Retrieved June 01, 2016, from http://www.pbs.org /wgbh/pages/frontline/shows/dope/interviews/kleiman.html

Top 10 Pros and Cons - Medical Marijuana - ProCon.org. (2009). Retrieved June 01, 2016, from http://medicalmarijuana.procon.org /view.resource.php?resourceID=000141