Gwinnett Environmental & Heritage Center
... that upon its completion, the Gwinnett Environmental & Heritage Center had the largest sloped green roof in the United States?
... that upon its completion, the <b id="mwAmk"><a href="./Gwinnett_Environmental_&amp;_Heritage_Center" id="mwAmo" rel="mw:WikiLink" title="Gwinnett Environmental &amp; Heritage Center">Gwinnett Environmental &amp; Heritage Center</a></b> had the largest sloped <a href="./Green_roof" id="mwAms" rel="mw:WikiLink" title="Green roof">green roof</a> in the United States?