Earth Hour en Big city lights to go out for Earth Hour tonight <p><iframe allowfullscreen="" frameborder="0" height="248" src="" width="440"></iframe></p><p>If you see a big bridge or stadium suddenly go dark tonight, don't be alarmed.</p><p>Seattle and Tacoma are joining thousands of cities around the world and turning out the lights for<a href=""> Earth Hour</a>, from 7:30 to 8:30 p.m.</p><p>Landmark buildings will go dark for the hour, and residents are encouraged to take part by turning out all non-essential lights to support the ongoing fight against climate change.</p> Sat, 23 Mar 2013 19:10:03 +0000 Bellamy Pailthorp 8117 at