Australian Broadcasting Corporation: As landholders in northern Queensland continue to watch a monsoon trough in the Gulf of Carpentaria, debate is raging over whether the state’s climate is changing. There are hopes the trough, and another low off the east coast, will bring some good summer rain. Most of the state had below average totals in 2007, with Toowoomba, in the south, recording its lowest tally since 1919. In other places though, rain has been above average, with Longreach seeing a 32 per cent …