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
Notes from the Underground (Hollywood Undead album) much fun they had doing without the label telling them what to do, he explained this record will be more like "Swan Songs" than "American Tragedy". He also revealed the album will be released on January 8, 2013. On December 11, the band announced that they will embark on a headlining tour titled "The Underground Tour", to promote "Notes from the Underground". Tour dates range from January 8, 2013, to January 23, starting in Hollywood, California. A video was released in promotion of the upcoming tour. On October 29, 2012, the first official single from "Notes from the Underground", titled