So for those of you who don't know, tonight is Earth Hour! Earth Hour is a worldwide event where individuals and communities turn off their lights for one hour. It starts at 8:30 pm (local time) and all you have to do is turn off your lights and any other electrical appliances that you want. It's really cool because a ton of big landmarks also turn out their lights, such as the Empire State Building, Big Ben, the Eiffel Tower, the Colosseum, and many many other places. It's the biggest voluntary event ever in history, and in it's 4th year, I'm sure it will be huge.