From the Texas Tribune:

..."Yet the state’s renewed commitment to gas comes at a time of sharply increased scrutiny for the gas industry. Gas burns more cleanly than coal, its chief rival in electricity-generation. Gas prices have also been low in the past few years, which is good for the power and home heating sectors and manufacturers like fertilizer plants that also use it. 

But the recent surge in drilling, including the expansion of a method called hydraulic fracturing that involves shattering rock thousands of feet underground with a combination of water, sand and chemicals, has prompted lawsuits and complaints by some homeowners in Texas and in other parts of the country about contamination of aquifers, as well as concerns about the sheer volume of water needed to operate a well. The industry denies that hydraulic fracturing, by itself, can contaminate aquifers. But worries about air pollution from drilling operations have also stirred anger in the Barnett Shale around Fort Worth, the earliest of three major Texas shale formations to be drilled (the third formation is the Haynesville Shale, in eastern Texas stretching into Louisiana).

Here's the link.

http://www.texastribune.org/texas-energy/energy/rich-with-natural-g...