http://www.nyscf.org/Science should drive policy because with science it is all facts and not lies.
Scientist should not care about what they are doing just that they are trying their best.
When they use Embryonic stem cells thy are killing the baby and that is wrong in every way. Babies are people from the time of conception and killing them is pretty much murder.
Pro is that Embryonic is more universal but you are killing a baby. Adult cells aren't as universal but at least you do not have to kill anyone to get them.