How Does Oil and Gas Fracking Work? - Hill Country Exploration, Inc.
fracking | Definition, Environmental Concerns, & Facts | Britannica
Orphan' oil wells warning for fracking – Royal Dutch Shell Plc .com
Colombia Looks to Fracking to Revert Declining Production - Natural Gas Intelligence
Fracking 101 | NRDC
The Fracking Facts
Path to fracking eased in oil, gas drilling plans - Capitol Weekly | Capitol Weekly | Capitol Weekly: The Newspaper of California State Government and Politics.
How Much Water Does Fracking Use? — Martin and Wood Water Consultants | Colorado
Fracking for Oil, Gas With Electric or Natural Gas Fleets More Common in U.S. - Bloomberg