Question: "Does storm water have an economic value?" Mike Young: "The economic side of which, which actually fascinates me, is that people in the past thought the storm water wasn't a useful resource. And suddenly people are finding that it has actually value and they're starting to hold it and claim it as theirs. With tradeable water taken into the equation and with high water prices ariving, people are starting to argue over who actually owns the storm water and that is a fascinating debate. You can imagine the local council saying: 'it's ours' and the sewerage treatment authority saying: 'no, it's ours'. There's a lot of detail been actually sorted out in law as well as in the environmental management bill. A fascinating area. And that was Mike Young from CSIRO Land and Water. For more information on that story call the CSIRO on 1300 363 400.