User talk:John Smith 117

November 2011
Hello, and welcome to Wikipedia. Although everyone is welcome to contribute to Wikipedia, at least one of your recent edits, such as the one you made to Sustainable development in an urban water supply network with this edit, did not appear to be constructive, and has been reverted or removed. Please use the sandbox for any test edits you would like to make, and read the welcome page to learn more about contributing constructively to this encyclopedia. Thank you. Epbr123 (talk) 10:54, 7 November 2011 (UTC)