Global warming, the topic itself, is covered in any kind of news paper, blog or other kind of media. Ad nauseam. However, every once in a while I come across with a nice approach towards saving energy. The idea per se isn’t new for me, since I tend to automatically soak up any San Francisco related news like a sponge (again I recommend Metroblog SF - in an all new design, btw). Here’s the deal: Cities around the world decided to host a huge event where they turn off all their lights for an hour. San Francisco did that last October with the Lights Out San Francisco event. They originally planned a Lights Out America version that happens to coincide with Earth Hour day. Sydney gets the credit for the initiating process of Earth Hour. So, now they’re going global. Earth Hour.