None. You would have to smoke 6500 or more joints to reach a toxic level. There is a risk when smoking anything that the lungs could be affected. Vaporizing or eating marijuana is a healthier option.
More than 5,000,000 people die each year from smoking to tobacco. A total of 0 people have been reported to have died from smoking marijuana since humans discovered it.
About 5.4 million
everyone
Zero percent is the chances.
About 2 million people die from smoking each year in the us alone.
none.
500,000 people die a year on average from lung cancer and cancer caused from smoking
As of recent statistics from 2007 3271 people die from smoking each year.
Zero
It is estimated that around 8 million people start smoking worldwide each year.
None
30,000 people die a year from health defects caused by marijuana, such as heart attacks. See the related link below.