as we look ahead in the decades to come, we do look at the possibility of a continuing continuingly inseee water-supply system. we have a system that is complicated and served the needs of our state for decades, but it was designed and built for a population about half the size we are at today. we are headed to 50 million by 2050, and even without the ag ci industry's continued growth, we have to change the system. there are conversation efforts, desalination has potential and i think all of the tools need to be brought to the table if we're going to manage our water resources in the decades to come. >> tom is arizona already there? >> well, certainly in the short-term, we're already there, and i'll throw out some numbers that might evidence what our water management and conversation and reuse programs have accomplished in the state of arizona. if you look at the time period, 1957 to 2011, our population has gone up 452%. our gross domestic product has gone up 1,578%. and our water use has actually gone down from about 7 million to 6.9 million. so we have done a lot of good over the years