Alternative Energy

HOPE, NM - JUNE 4: Employees of Halliburton Company and other engineering company workers gather for a safety meeting at a natural gas well site on June 4, 2007, outside of Hope, in eastern New Mexico. Halliburton, a Texas based oil and gas service company, has been contracted by Parallel Petroleum Corporation, the well operator, to have the gas well "fracked" or fractured, a hydraulic fracturing process that breaks through the dense underground rock and unlocks the natural gas within. Water, acid, sand and liquid carbon dioxide are injected under heavy pressure into the gas well while explosive charges are strategically placed in the well deep underground. (Photo by Robert Nickelsberg/Getty Images)