Mother Nature Network: The natural gas extraction technique known as fracking uses so much water that it could threaten groundwater resources, especially in the Western U.S., two new reports conclude. The first report (pdf), from the Western Organization of Resource Councils (WORC), found that hydraulic fracking removes 7 billion gallons of water every year in just four states: North Dakota, Wyoming, Montana and Colorado. The organization blames inadequate federal and state-level protections for the use and/or contamination...