World Wildlife Fund http://wvxu.org en Group urges you to turn out the lights Saturday between 8:30-9:30 p.m. http://wvxu.org/post/group-urges-you-turn-out-lights-saturday-between-830-930-pm <p>7,000 cities around the world will be participating in the <a href="http://www.earthhour.org/" target="_blank">Earth Hour Challenge </a>Saturday night between 8:30-9:30 p.m. It started with one city in 2007 and is now sponsored by the World Wildlife Fund. People are asked to turn out their lights for one hour to show concern for the environment.&nbsp;</p> Fri, 22 Mar 2013 16:04:26 +0000 Maryanne Zeleznik 10615 at http://wvxu.org Group urges you to turn out the lights Saturday between 8:30-9:30 p.m.