This summer is going to be hot. So if you are looking for some cooling, come to Zaragoza for a real sparkling experience: "Water and sustainable development" is the motto of the Expo 2008 taking place in the Spanish city from June until September.In our video series about the Expo you can learn more about hottest topics of the international exposition. We start with the ZaragozaKioto project, an exhibition for sustainable architecture solutions at the Spanish Pavillion.