Marijuana is the most popular illegal drug in the world noted by the marijuana statistics. Marijuana is dried shredded leaves of the hemp plant. 
It is usually smoked in a pipe or rolled in cigarette paper. It contains a high potency of THC which alters the brain. Marijuana is an addicting drug. Very popular with high school students with the cost being one of the cheapest drugs.
Respiratory Problem from Marijuana Abuse
Smoking marijuana can lead to respiratory problems. The smoke will damage and destroy your lung tissue. You will experience frequent chest colds that will take longer to get rid of with smoking regularly. Producing a daily cough and symptoms of bronchitis are very common with the use. Because marijuana users inhale deeply and hold the smoke in their lungs, they receive more tar than a cigarette smoker. The carbon monoxide is 5 times greater than a cigarette smoker and this will cause health issues later in life. The cancer rate rises with smoking on a regular basis than a cigarette smoker because a cigarette has a filter that cuts back on the tar but a marijuana cigarette does not have a filter and about one third more tar goes into the respiratory tract.
Marijuana Statistics on the Effects on Your Brain
Marijuana statistics show that using this drug will effect a persons brain. Memory and time perception is a major effect. The main ingredient in marijuana is THC and it influences the activity of nerve cells. Your concentration and thought is effected and normally you will have problems with your coordination. As a person ages, they will lose nerve cells in the brain and if you are a marijuana user you will lose them at an earlier age.
Effects on Your Heart
Marijuana statistics show there are effects on a persons heart. After a person smokes marijuana their heart rate increases by 20 to 100 percent and this can last up to 3 hours. This creates a risk of a heart attack after smoking. The risk is a lot higher with people who already have heart problems. Studies have shown higher levels of protein in the blood that increases triglycerides which are linked to vascular and coronary disease.
Effects on Your Driving
The use of marijuana has effects on driving. Drivers are 3 times more likely to cause an accident than a person who does not use. They have slower responses to driving situations, follow to closely to a vehicle and poor judgment in curves and stopping distance. They become dazed and do not pay attention to what is going on around them. There are times when a person smokes marijuana they even forget where they are at. They seem to drive a lot faster than normal and when your ability to judgment is altered, you do not stop in enough time. Marijuana statistics show increased accidents with a younger driving age.