What will you be doing on Saturday, March 28, 2009 at 8:30 P.M. local time? Will you be sitting in the dark? If the WWF-World Wide Fund For Nature meets its goal, over a billion of your global neighbors will be turning off their lights for an hour in a symbolic gesture to increase awareness about human-induced climate change–all participating in a worldwide event called Earth Hour.Earth Hour originated in Sydney, Australia in 2007, when approximately two-million people participated in the local event by turning