The main theme of the 4th World Water Congress will be "local actions for global challenge." The activities of the 4th World Water Forum will, therefore, seek to harness the practical, intellectual, financial, and political means to support local action on a global scale. The forum will address the decisive factors in the accomplishment of common goals by diverse actors in diverse places, searching to enable an improved involvement and empowerment of local actors in the social construction of solutions to water issues and a more appropriate channeling of domestic and international support for local actions worldwide.