Yes there is a story about Agent Orange and we knew that it harmed our troops and we knew how long it was to get the medical community to accept that the military to accept it the VA to accept it.
We have a lot to gain through furthering stem cell research but medical breakthroughs should be fundamentally about saving not destroying human life. Therefore I support stem cell research that does not destroy the embryo.
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When you talk about obesity there's so many things that can cause that. It can be a medical thing or down to the individual. There's a lot of other things involved than eating a Mars bar.