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POPSDrought a result of natural causes, says researcher Philip McGuire says: STEVE Bracks, John Thwaites and Bruce Esplin have just lost their most important defence against accusations of bad management leading to this summer's feral fires. http://www.theaustralian.news.com.au/story/0,20867,209805... The CSIRO says the drought gripping the south-east of Australia is due to natural climate variations and not the greenhouse effect. That should put a dampener on attempts to blame the disaster on global warming and climate change. CSIRO researcher, Barrie Hunt, says that people who claim the present drought is a once in 1000 year phenomenon have no understanding of natural climate variability. "They don't understand that according to natural variability we could get another one in 50 years or it might be another 800 years, and there's no way of predicting it," he says.