Also, the key here is MODERATE amounts. (Yes, a gray area )
All the many, many, many, MANY women I know who smoked pot while pregnant did it a maximum of a few times per month. While their nausea was particularly bad, or in my case, my depression/anxiety were debilitating.
Someone that is smoking pot all day is definitely going to be hurting their lungs, and that is a far cry from someone who is having a puff or 2 every once in a while.
Sometimes it seems...