This year the World Wildlife Foundation is encouraging cities to reduce their carbon footprint and to prepare for increasingly extreme weather conditions through their Earth Hour City Challenge.  The Earth Hour City Challenge is a year long competition during which participating cities will receive resources and gain public recognition for their efforts to promote renewable energy and prepare for the future.  The deadline to apply for the challenge is November 19, 2012.  To learn more about the competition, or to sign your city up please visit the Earth Hour City Challenge website.