Australian Broadcasting Corporation: South Australia is one of the most vulnerable regions in the world when it comes to climate change. This has come from leading climate change expert, Professor Tim Flannery, who will be speaking in the state this week. Professor Flannery says there are several reasons why South Australians need to be alert to climate change. "Severe water problems in the region, you’re at the bottom of a catchment that’s been very seriously impacted by climate change and of course you’re …