<http://schema.org/description>
"More than 150 Indian cities and over 150 countries will participate in the Earth Hour on Saturday to raise awareness about climate change and its impact."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.oneindia.com/2013/03/23/earth-hour-today-will-be-2-billion-people-event-1178616.html>