Canberra Times: A key senator’s concerns about the Federal Government’s emissions trading scheme have strengthened during his self-funded visit to North America. Independent senator Nick Xenophon, who shares the balance of power in the upper house, fears the scheme is poorly designed. ”In its current form … I’m not convinced that this design is the way to go and we should also go for more ambitious targets,” he said. ”The big concern I’ve had is … that unless we get the design of …