Sydney Morning Herald: When Julia Gillard and Hillary Clinton announced they wanted to ”make solar power competitive with conventional power sources” within five years, they left out one important detail. Their goal was based on solar being competitive with coal-fired power after a carbon price had been imposed. When you think about it this is obvious – if solar power could provide electricity as cheaply as coal-fired power without putting a cost on the emissions from coal, then we wouldn’t need to impose that…