Facts
In 1972, after reviewing the scientific evidence, the National Commission on Marihuana and Drug Abuse concluded that while marijuana was not entirely safe, its dangers had been grossly overstated. Since then, researchers have conducted thousands of studies of humans, animals, and cell cultures. None reveal any findings dramatically different from those described by the National Commission in 1972. In 1995, based on thirty years of scientific research, editors of the British medical journal Lancet concluded that 'the smoking of cannabis, even long term, is not harmful to health


The active ingredient in marijuana is THC (tetrahydrocannabinal). The behaviors exhibited by introducing THC to brain chemistry are similar those demonstrated by alcohol use.



Smoking marijuana decreases blood flow to the brain ,is very damaging to your long and short term memory systems and some studies indicate it is more damaging to your lungs than smoking cigarettes.

Other shit facts
EFFECTS OF WEED:

Within a few minutes of inhaling marijuana smoke, users likely experience dry mouth, rapid heartbeat, some loss of coordination and poor sense of balance, and slower reaction times, along with intoxication. Blood vessels in the eye expand. For some people, marijuana raises blood pressure slightly and can double the normal heart rate. This effect can be greater when other drugs are mixed with marijuana. Research also has documented the following chronic or long-term effects of marijuana use.


EFFECTS ON THE BRAIN:

THC suppresses the neurons in the information-processing system of the hippocampus, the part of the brain that is crucial for learning, memory, and the integration of sensory experiences with emotions and motivation. Researchers have discovered that learned behaviors, which depend on the hippocampus, deteriorate after chronic exposure to THC. Chronic abuse of marijuana also is associated with impaired attention and memory, while prenatal exposure to marijuana is associated with impaired verbal reasoning and memory in preschool children. Of possible relevance are findings from animal studies showing that chronic exposure to THC damages and destroys nerve cells and causes other pathological changes in the hippocampus.

EFFECTS ON THE RESPITORY SYSTEM:

Someone who smokes marijuana regularly may have many of the same respiratory problems that tobacco smokers have. These individuals may have daily cough and phlegm, symptoms of chronic bronchitis, and more frequent chest colds. Continuing to smoke marijuana can lead to abnormal functioning of the lungs and airways. Scientists have found signs of lung tissue injured or destroyed by marijuana smoke.

pot kicks ass, smoke it!