The Environmental Protection Agency had to subpoena Halliburton for information on the chemicals it uses for hydraulic fracturing. Hydraulic fracturing of the shale beds underground is high-pressure injection of water, sand and chemicals deep. Breaking up the rock formations releases the natural gas.
In a statement, the E.P.A. said it had made a voluntary request for the information from eight other major drilling companies, all of which had either provided the information or pledged full cooperation by early December.
The focus is on the profit from this source of natural gas, and not the water used, what to do with the contaminated* waste water, or aquifer disruption.
* Editor’s note: This can include radioactive contamination.