Which causes more deaths (personal or accidental)? diseases? divorces? addictions? whatever you can think of...
209452
According to most research on the subject, alcohol is more dangerous than marijuana.  Alcohol, in moderation, does have benefits, though.  When either is used in excess, you see health problems and diseases.  Marijuana is not addictive, alcohol is.  Both can cause accidents.  Of the two, I'd rather be around a pot smoker than a drunk, but that's just my opinion.
232898
lack of sleep, depression , stress, trauma ( as in winessing or being involved in a catastrophe)\nabuse, mental illness, ADD ( dont really believe in it )\nstarvation.
456657
Most things are good, in moderation. Anything in excess could kill you (even water). There's nothing wrong with having a glass of wine every now and then, as David pointed out. It's making a habit of it, or depending on the wine to ease your spirits, that causes problems. Don't get drunk, and you're okay.
609353
The Statistical Abstract of the US is the first place I look for this stuff.  In 2002, for people age 15-24, there were about 33,000 deaths.  15,000 were accidents, and 11,000 of those were motor vehicle accidents.  5,000 were homicide, 4,000 were suicide, 2,000 were cancer.\n\nThe CDC also keeps detailed mortality information.  I don't have a quick ref for death rates outside the US.
534357
Death rates would increase especially 15-40 year olds (highest number of people starting meth use now are in this age group)\n\nTraffic accidents & fatalities will increase\n\nLarger number of abandoned children or children forcibly taken from families and put in foster care (because most meth users are in child bearing age)\n\nHealthcare costs will rise - including dental (meth users destroy their teeth)\n\nMany others - these are just my initial guesses
648191
Increased numbers of sexual partners not only increases your risk of HIV/AIDS, it also increases the risk of HPV, the disease that may cause cervical cancer, anal cancer or genital warts, depending on which type of the virus you get, as well as other STD's.  The desire to protect your body must be stronger than your urge for sex.  If you have a plan on how to refrain when you are put into a compromising situation, it might help.
619715
I think they are both bad....smoking destroys your lungs. Alcohol destroys your liver...stomach and brain. Alcohol killed my mom. What makes Alcohol dangerous is that the disease of alcoholism can be passed down through the generations. I am a recovering alcoholic. My moms brother is an alcoholic. My grandfather was. There is no disease of smoking that passes down through the family trees....but smoking does kill people.
362863
I think they're both about equally harmful.\nhttp://en.wikipedia.org/wiki/Meth#Side_effects\nhttp://en.wikipedia.org/wiki/Cigarette#Contents_and_health_effects
471392
Men drink more than women, but not by much.  \nAlcohol stats can be decieving because lots of drinkers don't realize they are PROBLEM DRINKERS.\nThe consequences can be huge, resulting in job loss, ruined relationships with family and friends, revoked driving priveledge, jail, chronic liver damage, or even death. \nMost consumed liquor worldwide is vodka.\nAlcoholism can be related to violence and low job productivity, but robbery isn't  that prevelant.
203272
Being alone.  I try to surround myself with people that I love at all times. I'm on the phone, on the computer....all the time. I have panic attacks when my children get sick for fear of living my life without them. Don't know why really. I think it was brought on in the last couple years when my mother got caught up in methamphetamines. I haven't had a mother ever since. Some questions are better left unanswered.
334598
causes cancer\ni guess
14463
Ask your DOCTOR!  People can get killed with helpful advice!
17339
illicit drugs?\nIt's greater than God to the people that use them, more evil than the devil, the poor make it(so they have it), the rich are addicted(so they need it), and most people that use them die.
488344
If you include other nations, yes disease,\n\nBut even in the US, more people are killed in auto wrecks in just one state of the US than are killed in the war each year.\n\nSo allowing US citiznes to drive cars are far more dangerous than the war is.
115277
Too much of it will cause high blood pressure, know from experience
451554
Alcochol and cigarettes are both pretty bad, I've had family & friends die from both of those.....but no "marijuana" related deaths....go figure....the legal ones kill.....
21844
oil, coal, natural gas.\n\nancient plant matter.\n\nIt depends on how old the human is. An adult has 206.\n\nIt isn't. But it might be just as bad, depends on the chemical and the duration and level of exposure.\n\nHuman Immuno-deficiency Virus.