2. Marijuana damages the reproductive system

This claim is based chiefly on the work of Dr.
Gabriel Nahas, who experimented with tissue (cells)
isolated in petri dishes, and the work of researchers who
dosed animals with near-lethal amounts of cannabinoids
(i.e., the intoxicating part of marijuana). Nahas'
generalizations from his petri dishes to human beings have been
rejected by the scientific community as being invalid. In
the case of the animal experiments, the animals that survived
their ordeal returned to normal within 30 days of the end
of the experiment. Studies of actual human populations
have failed to demonstrate that marijuana adversely
affects the reproductive system.