Greens leader Richard Di Natale has slammed critics of windfarms, saying there is no need to investigate them. 'We don't have evidence of alien abduction – should we be spending public funds looking into it? No, we shouldn't', he says. Di Natale says there's no evidence wind turbines adversely affect people's health and that 'every cent we spend researching this nonsense is one less dollar not spent in cancer research, in diabetes research'