SOCIAL INTERACTION
Both marijuana and alcohol make social interaction easier in that they both lower inhibitions so people may make incorrect choices. However, marijuana generally makes people friendly and giggly. Alcohol often makes people aggressive and confrontational, which sometimes results in violence.
DRIVING
Driving is STUPID if you have recently used either alcohol or marijuana, and is against the law. However, alcohol makes people aggressive. People who drive on alcohol often speed without realizing they are speeding. Accidents get much worse if someone is speeding. People who drive on marijuana generally drive very carefully and slowly, which makes them "road boulders".
WORK ETHIC
Both alcohol and grass can affect people's work, especially overuse of either substance.
LENGTH OF EFFECT
Both alcohol and marijuana will affect a person for about two or three hours after last use. If you eat marijuana on an empty stomach, the effects may last for four hours.
ADDICTION
Alcohol is physically addictive, in that you can get very ill if you habitually drink a lot of alcohol and suddenly stop drinking. The alcohol addict can get conflusive seizures and delirium tremens (DTs), which can result in death. Marijuana is not physically addictive. You may miss the effects of marijuana, but stopping marijuana use will not result in physical symptoms.
CALORIES
Alcohol is fattening, and causes a desire to eat salty, fattening food. Marijuana has no calories, but may cause "the munchies", which is a desire to eat snack food.
PHYSICAL EFFECTS
Alcohol kills brain cells, and damages the liver. So far, I have not found any scientific evidence which found adverse physical effects from using marijuana. And believe me, the US government has spent A LOT of money unsuccessfully trying to find that grass damages the body.
Alcohol causes a person to feel lousy the next day. This is called a "hangover". Marijuana does not.
Alcohol used on the skin kills germs. Alcohol used in the hair kills lice (but is flammable, so be careful). Marijuana may have beneficial effects on arthritis, glaucoma, nausea, pain, depression, and sleeplessness.
HOMEMADE
Both alcohol and marijuana can be produced at home. Both are difficult to produce as a quality product.
ENFORCEMENT OF LAWS
Alcohol is taxed and sales are controlled. It is difficult for children to purchase alcohol. Marijuana is underground. No taxes are paid on sales. Marijuana is relatively easy for children to purchase as the sellers hide their activities.
ONE THIRD of the people in jail and prison in California are in for marijuana related offenses at a cost of $65,000 a year per prisoner. Nationally, the percentage of people in prison and jails for marijuana is over 40%.
Our prisons in California are so overcrowded that the federal court has ordered California to release prisoners. DO WE REALLY WANT TO SPEND CALIFORNIA TAX DOLLARS ON PUTTING PEOPLE IN JAIL OR PRISON FOR USE OR POSSESSION OR GROWING OF MARIJUANA? Frankly, I think incarcerating people for marijuana use, possession and/or growing is a criminal waste of our tax dollars.