 Urban metabolism is really about what goes into the city and what comes out of the city, either as product or as waste. It's exciting to be in Cape Town for the first time, especially in this very urban metabolism centre venue. So we are convinced that not only is it important to continue doing this type of analysis but it's important I think. How do we combine not just the high level data but combine it with neighbourhood and bottom up data. You've seen these different projects that are happening in Cape Town and we've discussed some of the issues, the challenges that exist.