Tons of Hollywood celebrities have been going green for quite awhile, making the switch from gas-fueled cars to hybrid/electric vehicles and designing/marketing/advertising/buying eco-friendly attire. The latest craze in going green is definitely going solar, and many celebrities such as Edward Norton, Johnny Depp, and Leonardo DiCaprio, to name a few, are doing (or have done) just that. These guys are setting a great example and are demonstrating, by example, just how much energy costs can be diminished by investing in alternative energy sources. Larry Hagman is known to have one of the largest homes in the United States, and in accordance to this article, his yearly electric bill dropped from a whopping $37,000 to a mere $13, once he switched to solar energy! Edward Norton founded the BP Solar Neighbors, a non-profit organization who donates a solar system to a low-income family in California, every time a celebrity uses the program to install solar panels on their home. With this kind of incentive and these amazing results, it's no surprise that so many celebrities are going solar.