. >> shellen bergser just one of a small but influential group of former nuclear opponents, climate scientists and innovator whose are coming out in favor of nuclear energy. how big a counter movement would you say this is. >> calling on them to support the next generation. president obama is certainly pronuclear, i get emails every week for people that are excited for an environmental vision that recognize it is need for a serious advance technology. >> how much he says the industry has learned from disaster. >> nuclear power plants got much safer after three-mile island. after the fukushima disaster you saw a reaction by nuclear power operators to take a second look at earthquake risks. >> a co founder of green peace and a supporter of nuclear energy. >> the industry has used it's new converts to rebrand itself. as a source of clean, and safe energy. >> many onus the nuclear industry have fought for some time to have acknowledged as a green source. it is a very benign source. >> i can see people listening to you rolling their uses. saying did you hear what he just said. >> yep. i think i wou