Smoking weed has no bearing on how "strong" a mans sperm is.
Of course not, especially if one smokes pot within 30-90 days before a test (depending on how much/often they smoke).
I knew of a 13 year old who sells and smokes weed on a daily basis
the intake of marijuana, as long as it is not daily, has no risks(if you dont have a condition that says otherwise)
There are no documented cases of an individual dying via marijuana overdose, therefore no amount of people "die a day" directly from cannabis consumption.
Irritates your lungs, that's it. Much like a daily cigarette smoker, you'll be coughing up black goop. My friend has this problem, but that's because he smokes all day everyday. You're fine if you smoke every few days.
Answer People who have been using pot for a long time get brown circles under their eyes for one. Secondly they get grumpy when they don't have their daily joints and don't let anyone ever tell you it's not addictive, as it is very addictive. They soon develope a harsh cough which is dry and while it's not a proven fact depending on how the person smokes it, but it can be a cause for Cancer as pot smokes hot, and people who smoke it long term could get Cancer of the mouth or lips.
im doubt it would cause an official diagnoses of ADD, however marijuana activly effects the memory and concentration skills amongst other key skills used when studying.
Smoking cigarettes everyday is the worst of the three. Drinking is fine in moderation, but excess can kill your liver and/or kidneys. The illegal substance is probably the healthiest (or less harmful) of the group. In any case, anything is good in moderation; its excess that will kill you.
Almost three and half
You cant.
Once a pregnancy is established, no. The pills can only prevent pregnancy ( though they are not 100% effective) if given the time to saturate your bloodstream and taken daily to prevent pregnancy. Taking the pills, if you haven't been taking them to prevent pregnancy, will not cause a miscarriage. I suggest going to a doctor.