Vancouver Sun: Earth Hour may be a symbolic gesture on Saturday night, a time when people around the world are asked to turn off their lights and power down their appliances and computers from 8:30 p.m. to 9:30 p.m. in an effort to reduce our footprint. But organizers are expecting much more, hopeful that individuals will pause to consider their impact on the planet and how they can continue to make a difference. Globally, the goal is participation by one billion people. More than 2,700 …