Geothermal energy in the United States Geothermal Data System (NGDS). Through the NGDS, many older paper archives and drill logs that are stored at state geological surveys are now being digitized and made available for free to the public. The underground hot water and steam used to generate geothermal power may contain chemicals that could pollute the air and water if released at the surface. Hydrogen sulfide, which is toxic in high concentrations, is sometimes found in geothermal systems. Newer methods of generating geothermal power separate the hot steam collected underground from the steam used to power turbines, and substantially reduce the risk of releasing air-polluting
Guitar Hero Encore: Rocks the 80s Court judge stating that Activision had obtained the proper licensing for the works and that the band itself no longer held the copyright on the work. Guitar Hero Encore: Rocks the 80s Guitar Hero Encore: Rocks the 80s (titled Guitar Hero: Rocks the 80s in Europe) is a music rhythm game and the third installment in the popular "Guitar Hero" series. It was released in July 2007 in North America and Europe, and in August 2007 in Australia. Players use a guitar-shaped controller (purchased separately) to simulate playing rock music by hitting notes as they scroll towards the player. "Rocks