09 Mar 2012:
Some Shale Formations
Impervious To Fracking, CEO Says
Exxon Mobil CEO Rex Tillerson says that a drilling method that has made vast natural gas resources accessible across the U.S. has been unable to crack some shale rock formations in Europe and China
. Speaking to energy analysts, Tillerson said two attempts to tap gas-rich shale fields in Poland through hydraulic fracturing techniques have been unsuccessful despite the use of high-pressure torrents of water and sand. The drilling technique, also known as fracking, involves blasting a mixture of water, sand, and chemicals deep underground to shatter shale formations and free natural gas trapped within. “Some of the shales don’t respond as well to hydraulic fracturing,” Tillerson told reporters, according to Bloomberg News
. “It’s going to take research and time in the lab to understand that.” Tillerson said some shale formations in the U.S. have also been impervious to fracking, and that the company is studying whether the use of different fluids or pumping techniques will make a difference. The rapid spread of the drilling technique has caused increasing concern among environmentalists and some local residents, who contend it may pollute local water supplies.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
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Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.