Here is an interesting Texas Tribune article on waterless fracking technology that's beginning to get a toehold in the water-challenged Lone Star State. The article describes a company I've written about before - GasFrac, a Canadian service company that uses propane gel for fracturing. The article mentions other waterless techniques, including ones using CO2 or nitrogen.
The eyes of Texas may slowly be turning to waterless fracking alternatives. With water challenges looming if enormous shale gas resources are to be developed in other states like California and in dry countries like China, Australia, and South Africa, the eyes of the world may be on Texas, and on the business case for waterless fracking.